If you suspect your partner is being unfaithful, you deserve the truth — documented, legally gathered, and admissible in court. Our licensed investigators conduct discreet covert surveillance across New Hampshire and Massachusetts.

The short answer: We document what’s actually happening — not what you fear or suspect. Our investigators gather court-admissible photo and video evidence of your spouse’s activities using legal covert surveillance methods. Everything we do complies with NH and MA law, so your evidence holds up if it goes to court.

What an Infidelity Investigation Actually Involves

Most people who call us aren’t sure whether their suspicions are founded. That uncertainty — the not knowing — is often harder than the truth itself. A professional investigation gives you a definitive answer backed by documented evidence, not speculation.

Our investigators are former law enforcement — Mark J. Donahue is a retired Salem, NH police officer with 34 years of experience and federal task force credentials. We bring the same disciplined, methodical approach to every case.

What we document

• Your spouse’s movements, locations, and time spent with specific individuals
• Contact with persons of interest — meetings, arrivals, departures
• Physical affection or intimate behavior in public locations
• Patterns of deceptive behavior (claimed locations vs. actual locations)
• Vehicle activity, including make, model, plate, and location timestamps

Every finding is compiled into a written investigative report with timestamped photographs and video. You receive a complete documented record — professional, objective, and legally gathered.

How the Process Works

1. Free Confidential Consultation — You describe your situation. We listen without judgment, ask clarifying questions, and explain what an investigation can and cannot determine. No obligation.
2. Surveillance Planning — We design a surveillance plan around your spouse’s known routine — work schedule, social patterns, and any specific windows of concern. We discuss timeline and cost upfront so there are no surprises.
3. Covert Field Surveillance — Our investigator conducts mobile surveillance using professional equipment. We operate within the law at all times — public locations, legal observation only. No device hacking, no trespassing, no wiretapping.
4. Progress Updates — After each surveillance session, we debrief you on findings. You decide whether to continue. We never pad hours or extend unnecessarily.
5. Final Report & Evidence Package — You receive a complete investigative report with written findings, timestamped photos, and video. The report is formatted for use by your attorney if needed.

Is Surveillance Evidence Admissible in NH and MA Courts?

Yes — evidence gathered through legal surveillance by a licensed private investigator is admissible in both New Hampshire Family Division court and Massachusetts courts. This includes photos, video footage, and written investigative reports.

Evidence is inadmissible if collected through illegal means: hacking into accounts, recording conversations without proper consent, or trespassing on private property. We never do these things — not only because they’re illegal, but because they would destroy the case you’re trying to build.

If you’re working with a divorce attorney, we can coordinate directly with counsel to ensure our report format and evidence chain of custody meets their requirements.

What Our Investigators Will Not Do

• Hack into email, social media, or phone accounts
• Place tracking devices on vehicles without legal authority
• Record phone calls or private conversations
• Trespass onto private property
• Access private property or enclosed spaces
• Impersonate law enforcement or other officials

These restrictions exist because violating them would make your evidence inadmissible and could expose you to criminal or civil liability. Our value is in doing this right — not just fast.

Service Areas — Infidelity Investigations

We conduct cheating spouse investigations throughout New Hampshire and Massachusetts, including Manchester, Nashua, Concord, Portsmouth, Salem, and the seacoast region in NH; and Boston, Worcester, Lowell, Lawrence, Haverhill, and the MetroWest in MA. Mobile surveillance means we follow where the case leads.

Frequently Asked Questions

How do I hire a PI for a cheating spouse in Massachusetts?

Call 603-785-2800 for a free confidential consultation. We’ll discuss your situation, explain what surveillance can document, and give you an honest assessment of whether an investigation makes sense. If you proceed, we’ll draw up an engagement agreement, design a surveillance plan, and begin fieldwork — typically within a few days of engagement.

Is evidence from a private investigator admissible in NH divorce court?

Yes. Evidence gathered by a licensed New Hampshire private investigator through legal surveillance is admissible in NH Family Division court. This includes timestamped photographs, video, and written investigative reports. Evidence from illegal means — hacking accounts, recording conversations without consent, trespassing — is inadmissible and can expose you to liability. We only use legal methods.

How long does a cheating spouse investigation typically take?

Most cases run 2–4 surveillance sessions over one to three weeks. The timeline depends on your spouse’s routine and how quickly patterns emerge. After each session we debrief you on what was observed, and you decide whether to continue. We never extend an investigation beyond what the case warrants.

What does a PI actually do during infidelity surveillance?

Our investigators conduct mobile covert surveillance — following and observing your spouse in public areas, documenting meetings, movements, and behaviors with professional cameras. We log times, locations, license plates, and interactions. Everything is compiled into a written report with photo and video evidence formatted for your attorney if needed.

How much does an infidelity investigation cost in NH or MA?

Cost depends on the number of surveillance hours and geographic scope. We bill hourly with a retainer and provide full cost transparency before you commit. Most cases run $800–$2,500 depending on complexity. We don’t pad hours — if the case resolves quickly, you pay accordingly. Call for a free estimate based on your specific situation.

Free confidential consultation: 603-785-2800 — NH License #M-2025-0424 · MA License #LP1599A