Why Certain Private Investigation Cases Increase With the Seasons

Certain private investigation cases can become more noticeable or more active at different times of the year, but there is rarely one simple reason why.

Seasonal changes can create opportunity, alter routines, or make existing behavior easier to recognize. School may be back in session, work schedules may become more regular or change with seasonal business demand, remote-work arrangements may shift, families may travel less, holidays may change household routines, and weather or daylight can affect when and where people spend their time.

Other changes may be happening at the same time. A death in the family, job change, financial problem, separation, new relationship, health issue, substance use, or change in a person’s social circle can also affect behavior and daily routines. Sometimes what a client initially believes is connected to the season turns out to have another explanation entirely.

None of these factors automatically causes infidelity, parenting-plan problems, cohabitation concerns, questionable workers’ compensation activity, or another investigative issue. They are circumstances that can change opportunity, routine, behavior, and visibility.

In private investigation, those changes matter because a more recognizable pattern can make certain behavior easier to identify, document, and compare over time.

After more than 17 years working investigative cases, I have learned that the time of year can sometimes affect both what clients begin noticing and when surveillance is most likely to answer the question they are trying to resolve. The important part is understanding the individual case rather than assuming every situation follows the same seasonal pattern.

Sometimes the change is subtle. A spouse suddenly has a regular lunch schedule again. A parent begins handling the same school drop-off every morning. Someone who previously came directly home begins spending time with a different group of people. A claimant becomes active around the property when the weather improves. A vehicle starts appearing overnight at the same residence several nights each week.

Those are the types of changes and recurring behaviors investigators look for.

Why Seasonal Timing Can Matter in an Investigation

When I talk about seasonal investigation trends, I am not saying that the calendar itself causes the behavior.

What changes throughout the year is often the opportunity surrounding the behavior.

Consider how many parts of normal life change:

• Children return to school or begin summer break.
• Parents move between school-year and summer parenting schedules.
• Employers become busier or slower depending on seasonal demand.
• Remote-work arrangements may change.
• Employees use vacation time and later return to normal work hours.
• Outdoor activity rises and falls.
• Sports seasons begin and end.
• Holiday travel starts.
• Family gatherings increase.
• Daylight becomes longer or shorter.
• Weather changes how people work, travel and spend their free time.

Those changes may create new opportunity for certain behavior or simply make an existing pattern easier to identify.

A client may notice that a spouse now disappears every Tuesday afternoon because the children are back in school and that period of the day has opened up again.

A parenting-plan concern may become easier to document because the same school pickup occurs every weekday.

A workers’ compensation claimant may become more active when weather improves, seasonal work returns, outdoor recreation increases, or home projects begin.

A cohabitation pattern may become clearer when the same vehicle begins appearing overnight during a regular workweek rather than during summer vacations or holiday travel.

These examples do not explain every case. They illustrate why investigators look closely at routine, opportunity and repetition.

The better the routine is understood, the more efficiently surveillance can usually be planned.

Not Every Change in Behavior Is Seasonal

This is an important part of evaluating any investigation.

A noticeable change in someone’s routine may happen at the same time as a seasonal change without actually being caused by it.

Major events in a person’s life can change behavior substantially.

A death in the family is a good example.

Grief affects people differently. Someone may begin spending more time alone, stay away from home, reconnect with relatives or old friends, change sleeping habits, stop participating in normal activities, travel unexpectedly, drink more frequently, work longer hours, or simply behave differently than their spouse or family is accustomed to seeing.

Those changes can understandably cause concern, especially when communication within the relationship has also changed.

But changed behavior following a death does not automatically indicate infidelity or some other hidden activity.

An investigator needs to keep the larger circumstances in mind.

Substance Use Can Also Change a Person’s Routine

Drug use is another issue that can cause significant changes in behavior, activity and daily scheduling.

A spouse or partner may notice that the person:

• Begins spending time with a different group of people.
• Develops new friendships that seem to appear suddenly.
• Leaves home at unusual times.
• Stays away longer than expected.
• Changes sleeping patterns.
• Becomes increasingly secretive about where they have been.
• Begins missing work or changing work habits.
• Starts making unexplained trips or stops.
• Has unexplained spending or frequent cash withdrawals.
• Loses interest in activities they previously enjoyed.
• Becomes more socially isolated from established friends or family.
• Develops a schedule centered around people or locations that were previously not part of the person’s routine.

Substance use can also affect the person’s peer group over time. New associates may become a larger part of the person’s daily life while long-term friends, relatives, coworkers or a spouse see less of them.

None of these individual behaviors proves drug use.

They can also occur because of stress, grief, a new relationship, depression, employment problems, financial trouble, medical issues, or other major changes.

From an investigative standpoint, the important question is not simply, “Why is this person acting differently?”

The better question is, “What has actually changed, when did it change, and is there a recurring pattern that can be documented?”

That distinction helps prevent an investigation from being built around an assumption before the facts are known.

Infidelity Investigations: Opportunity Often Follows Routine

Suspected infidelity is one of the clearest examples of how changing schedules can affect investigative opportunity.

Summer may involve vacations, children at home, changing work hours, remote work, travel, visitors and irregular routines.

At other times of year, schedules may become much more structured.

A spouse may once again:

• Leave home at roughly the same time each morning.
• Have a predictable lunch period.
• Work remotely on the same days each week.
• Stay late on particular evenings.
• Attend recurring meetings.
• Go to the same gym or activity.
• Run the same errands.
• Travel for work on a regular schedule.

If another relationship already exists, that structure may also create predictable opportunities to meet.

The important point is not that work or school creates infidelity.

The important point is that routine can create opportunity.

What Clients Often Notice First

Many infidelity cases begin with a pattern rather than one dramatic event.

A client may notice:

• A regular late-work evening.
• Longer lunch periods on certain days.
• Repeated unexplained errands.
• Leaving home earlier than necessary.
• Recurring unexplained stops.
• A new activity that takes much longer than expected.
• More private phone behavior.
• A work trip or meeting schedule that does not seem consistent.
• A new group of friends or coworkers who suddenly occupy much more of the person’s time.

Any one of these may have a completely legitimate explanation.

What usually causes a spouse or partner to become concerned is not one event. It is the pattern.

The Pattern Usually Comes Before the Surveillance

If someone repeatedly disappears during the same time window, an investigator can place surveillance around that pattern instead of using the client’s budget on completely random days.

That makes the investigation more focused.

For example, if a spouse normally arrives home shortly after work but has recently begun staying out several hours later every Thursday, Thursday may be more useful than choosing a random Monday.

If unusually long lunch periods occur on the same two days each week, those periods may deserve closer attention.

If a person’s remote-work schedule changes and unexplained daytime activity begins at the same time, that may also help identify when surveillance is most likely to be useful.

It is still only a starting point.

The surveillance determines what actually occurs.

For more information, see Infidelity Surveillance Investigations.

Child Custody and Parenting Plans Change When School Starts

Child custody investigations are another area where the school year can substantially change the investigative picture.

Summer parenting schedules can be flexible and complicated.

Children may spend extended periods with one parent. Families travel. Grandparents provide childcare. Camps replace school. Exchange days change. Vacations create exceptions to normal parenting-plan schedules.

Once school resumes, much of that flexibility disappears.

There may now be regular:

• School drop-offs.
• School pickups.
• Parenting exchanges.
• After-school childcare.
• Sports practices.
• Medical appointments.
• Homework routines.
• Weeknight schedules.
• Weekend parenting periods.

This can make it easier to determine whether the parenting arrangement is functioning the way it has been represented.

Questions Can Become Easier to Define

A parent may contact an investigator because they believe:

• The other parent is not personally exercising parenting time.
• A child is repeatedly being left with someone else.
• School transportation is not occurring as represented.
• Exchanges are routinely late or missed.
• A parent is regularly spending the night somewhere other than the reported residence.
• A new partner or household member is consistently present.
• A child is being transported under circumstances that raise safety concerns.
• The child’s actual routine differs substantially from what has been represented.

During summer, some of those questions can be difficult to evaluate because there may be no consistent weekday baseline.

School creates more structure.

An investigator may now be able to observe actual morning, afternoon and evening routines rather than trying to interpret a vacation schedule that changes every few days.

Back-to-School Can Also Expose Existing Parenting Problems

The school year brings transportation, activities, childcare, homework, work schedules and exchanges back into the family’s daily routine.

A parenting arrangement that appeared manageable during summer may become much more difficult once those responsibilities return.

That can expose an existing problem that was less noticeable when the family’s schedule was more flexible.

Not every disagreement requires a private investigator.

Investigation becomes more useful when there is a repeated factual question that can actually be documented.

For more information, see Child Custody Surveillance & Parenting Plan Documentation.

Cohabitation Investigations Depend Heavily on Routine

Cohabitation is another issue where time and repetition usually matter more than one dramatic observation.

Seeing someone’s vehicle at another person’s residence one evening proves very little.

People visit each other.

People stay overnight.

People help friends and family.

People travel together.

The question in a cohabitation investigation is generally whether there is a consistent pattern suggesting that a person is actually using the residence as part of an ongoing household routine.

What Can Become More Visible During a Normal Work Week?

Once normal school and employment routines return, an investigator may be able to observe:

• Repeated overnight vehicle presence.
• Early-morning departures from the residence.
• Returning to the residence after work.
• Regular transportation of children.
• Shared errands.
• Weekend household routines.
• Visible movement of personal belongings.
• Consistent use of the residence over time.

A vehicle arriving for dinner and leaving later that evening is one thing.

A vehicle repeatedly remaining overnight, followed by early-morning departures to work and returning again after work, may provide very different information.

That is why cohabitation investigations often require more than one surveillance date.

What matters is consistency.

Schedules Can Change the Opportunity

Remote work can also affect this type of investigation.

A person who previously left a residence every weekday morning may begin working remotely several days each week. Another person’s schedule may change because their employer becomes busier or slower during a particular part of the year.

Those changes can alter the household pattern significantly.

An investigator has to understand that before deciding which dates and times are likely to provide useful information.

Our Cohabitation Investigations page provides more information about documenting recurring residence and household patterns.

Workers’ Compensation Claims Also Have Seasonal Investigative Patterns

Workers’ compensation cases are different from domestic investigations, but the same basic principle applies: people’s activities change throughout the year.

Seasonal changes can affect both the work environment where injuries occur and the activities a claimant performs afterward.

Warm Weather Can Produce More Observable Outdoor Activity

During warmer months, people may spend more time:

• Working in the yard.
• Building or repairing things outdoors.
• Riding motorcycles.
• Boating.
• Camping.
• Fishing.
• Hiking.
• Playing sports.
• Moving equipment.
• Working on vehicles.

If a claimant has represented substantial physical limitations, some of those activities may become relevant depending on the injury and the actual limitations being claimed.

They may also be completely consistent with the claim.

The investigator documents what occurs. The surveillance itself does not determine the medical significance of that activity.

Fall Creates Different Opportunities

As the weather and household routine change, other activities may become more common:

• Fall yard cleanup.
• Home repairs before winter.
• Firewood cutting or handling.
• Hunting activity.
• Seasonal employment.
• Vehicle or property maintenance.
• Regular school transportation.
• Recurring medical or therapy appointments.

Other subjects may become less active as the weather changes.

Again, there is no universal seasonal rule.

The important question is whether the subject has a recurring routine that can be observed and compared with the limitations relevant to the case.

Work Itself May Be Seasonal

Some occupations become significantly busier or slower during particular parts of the year.

Construction, landscaping, delivery work, retail, hospitality, agriculture and other industries may have substantial seasonal changes.

A person’s employment opportunities, side work, physical activity and daily schedule may change along with that demand.

That can create investigative opportunities that did not exist several months earlier.

Why Multiple Surveillance Dates Can Be Important

In my experience working workers’ compensation investigations, one surveillance day does not always provide enough information.

Someone with a legitimate injury can have a better day.

Someone overstating limitations can have a quiet day.

Rain can keep a person indoors. An appointment may be canceled. A planned activity may simply not happen.

When appropriate, several separate surveillance dates can provide a much more useful picture of ordinary activity.

Repeated documentation also provides context that a single short video clip cannot.

For more information, see our Workers’ Compensation Surveillance Investigations page.

The Holiday Season Can Change the Pattern Again

Just when fall routines become predictable, the holidays can change them again.

That can affect several types of investigations.

Infidelity

Holiday parties, business gatherings, travel, shopping trips and unusual evening events may create additional opportunities for someone involved in another relationship.

They also create many legitimate reasons for a person to be away from home.

Context remains important.

Child Custody and Parenting Plans

Holiday parenting schedules can be among the more complicated portions of a parenting plan.

Travel, family gatherings, school breaks and schedule changes can produce disagreements involving exchanges, transportation and where children are actually staying.

Cohabitation

Extended holiday periods may produce more overnights, shared travel and visible household activity.

A holiday stay by itself does not establish cohabitation.

The investigator still looks for the larger pattern.

Workers’ Compensation

Holiday shopping, decorating, travel, winter recreation and home projects may create observable physical activity that could be relevant in some claims.

The significance depends on the individual case and the limitations being represented.

Washington Weather and Shorter Daylight Change Surveillance Too

Seasonal changes do not only affect the person being investigated.

They affect the investigator.

Fall and winter surveillance in Washington can involve:

• Earlier darkness.
• Heavy rain.
• Fogged windows.
• Wet camera equipment.
• Reflections from headlights.
• Reduced visibility.
• School traffic.
• Longer commute times.
• More difficult vehicle identification.

A location that provides excellent surveillance conditions in July may be far more difficult later in the year.

A subject leaving work in the early evening may be driving in daylight during one season and complete darkness during another.

Weather can sometimes help an investigation as well.

People may follow more direct routines during poor weather. Outdoor crowds decrease. Some locations become quieter. A subject may make fewer unnecessary stops.

There is no single rule.

The investigator works with the conditions that actually exist.

Why a Pattern Usually Tells Us More Than One Event

A recurring theme runs through all of these investigations.

One event can be misleading.

A spouse stays late at work once.

A parent misses one exchange.

A vehicle remains overnight at another residence once.

A workers’ compensation claimant carries one heavy-looking object.

A person grieving a recent loss suddenly spends several nights away from home.

A spouse begins spending time with a new group of friends.

Each event may have an explanation.

Patterns provide context.

When the same conduct appears repeatedly under similar circumstances, an investigator can begin comparing one event with another.

That is why a useful surveillance plan usually asks:

• What behavior are we actually trying to document?
• When is that behavior most likely to occur?
• What changed before the behavior began?
• Does it happen repeatedly?
• Are there particular people, locations or vehicles involved?
• What would support or contradict the client’s concern?
• Would observations on multiple dates provide better context?

That last question is important.

An investigator should not simply look for evidence that confirms what the client already believes.

Sometimes the investigation confirms the concern.

Sometimes it points toward a completely different explanation.

Either outcome can provide the client with information they did not have before.

The goal is not to collect the largest amount of video.

The goal is to collect useful evidence that helps answer the question.

Where Divorce and Asset Questions Can Enter the Picture

Asset searches are not inherently seasonal in the same way surveillance can be.

A hidden property interest, undisclosed business or transferred asset does not suddenly become relevant because the weather changed.

However, changes in family relationships can have their own timing.

Couples may postpone major decisions during vacations, family events or holidays and address them later when ordinary life resumes.

When a separation or divorce begins moving forward, financial questions may follow:

• What property actually exists?
• Are there undisclosed businesses?
• Were assets transferred?
• Does reported income appear consistent with the person’s lifestyle?
• Are marital funds being spent elsewhere?
• Is another household being financially supported?

So I would not consider asset searches a seasonal investigative trend by themselves.

They may become relevant as a secondary issue when changes in a relationship lead toward separation, divorce or litigation.

For more information, see Asset Searches & Hidden Asset Investigations.

Use the Routine to Plan the Investigation

If you are considering surveillance, some of the most useful information you can provide is not what you suspect.

It is what you know.

Before contacting an investigator, consider writing down:

• Normal workdays.
• Approximate departure and arrival times.
• Remote-work days.
• School schedules.
• Parenting-plan exchange times.
• Known appointments.
• Recurring activities.
• Vehicle information.
• Known alternate locations.
• Days when the concerning behavior most often occurs.
• Changes that happened recently.
• New friends, associates or locations that have become part of the person’s routine.
• Major life events that occurred around the time the behavior changed.

A good investigator can then compare the expected routine with the behavior actually observed.

For example, tell the investigator if the change began after a new job, a death in the family, a new friendship, a work-schedule change, suspected drug use, the beginning of the school year or another major event.

That information does not establish the cause.

It provides context.

And context often helps determine when surveillance should occur and what the investigator should be watching for.

There are certainly cases where random surveillance is appropriate.

But when reliable scheduling information exists, it should be used.

Frequently Asked Questions About Seasonal Investigation Trends

Do cheating-spouse cases actually increase during certain seasons?

Relationship problems can occur at any time of year. What may change is the opportunity surrounding the relationship. School, work, travel, remote-work arrangements and other routine changes can make recurring behavior easier to recognize or investigate.

Why can the school year matter in an infidelity investigation?

School can create predictable household hours. Children may be away during known periods, work schedules may become more regular, and recurring unexplained absences can become easier to compare from week to week.

Could a major life event explain someone’s sudden change in behavior?

Yes. A death in the family, job change, financial problem, medical issue, relationship stress, substance use or another major event can alter a person’s behavior and schedule. That is why investigators should consider the circumstances surrounding the change rather than assuming one explanation at the beginning.

Can drug use change someone’s schedule and social circle?

It can. Substance use may be associated with changes in sleeping patterns, spending, friends, social activities, work habits, unexplained absences and the locations a person regularly visits. Those changes are not proof of drug use by themselves, but a recurring pattern may be relevant to an investigation.

Why are school schedules important in child custody investigations?

School creates recurring transportation, exchange and childcare responsibilities. Those routines can help document whether parenting-plan responsibilities are actually occurring as represented.

Does spending one night at someone’s house prove cohabitation?

No. Cohabitation investigations generally depend on repeated household patterns rather than a single overnight stay. Consistent overnights, morning departures, returns after work and other recurring activity may provide more meaningful context.

Does outdoor activity prove workers’ compensation fraud?

No. A claimant may be able to perform certain activities while still having a legitimate injury. Surveillance documents observable activity. Medical providers, insurers, attorneys and other decision-makers determine how that activity relates to the claimed limitations.

Why use several surveillance dates instead of one?

One day may not represent someone’s normal activity. Several dates can help determine whether an observation was isolated or part of a recurring pattern.

Is fall automatically the best time for surveillance?

No. The best timing depends on the individual case. Fall may create more predictable school and work schedules, while shorter daylight, rain and changing weather can make surveillance more difficult.

Does the holiday season make surveillance easier?

Sometimes. Holiday parties, travel, parenting schedules, family gatherings and extended overnights can create useful investigative opportunities. They can also create unusual behavior that is completely innocent, so context remains important.

Are asset searches seasonal?

Not directly. Asset investigations are usually triggered by divorce, litigation, judgments, support issues or financial disputes. Changes in family relationships may indirectly lead to asset research, but the assets themselves are not seasonal.

What is the most useful information to give a PI before surveillance begins?

Provide accurate subject and vehicle information, known routines, recurring schedules, likely dates and locations, recent changes in behavior, and a clear explanation of what you are trying to determine. Better intelligence generally allows surveillance to be planned more efficiently.

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