Licensed private investigation firm serving Manchester, Nashua, Concord, and all of southern New Hampshire. Former law enforcement. Court-admissible evidence. Free consultation.
Serving Manchester, NH: Donahue Investigative Services is a licensed NH private investigation firm with deep roots in southern New Hampshire. Mark J. Donahue is a retired Salem, NH police officer with 34 years of law enforcement experience — he knows this region, its courts, and how to gather evidence that holds up.
Private Investigation Services in Manchester, NH
Manchester is New Hampshire’s largest city — and like any urban center, it generates the full range of investigative needs: infidelity suspicions, contested custody arrangements, insurance fraud, employee misconduct, and people who need to be found. We handle all of it, professionally and discreetly.
Cheating Spouse Investigation
Covert surveillance and documentation of a partner’s activities, contacts, and movements.
Surveillance Investigations
Workers’ comp fraud, insurance abuse, corporate misconduct, and personal injury defense.
Child Custody Documentation
Parental behavior, visitation compliance, and household documentation for NH Family Division.
Background Checks & Skip Tracing
Professional background investigations and locate services for individuals and businesses.
Missing Persons Locate
Find missing family members, birth parents, estranged relatives, or witnesses for court.
Corporate Investigations
Employee theft, workplace fraud, due diligence, and internal investigation support.
Who Handles Your Manchester, NH Case
Mark J. Donahue
President of Donahue Investigative Services, Mark is a retired Salem, NH police officer with 34 years of law enforcement experience. He served on the DEA Task Force, the ICAC Task Force, and the AG Gang Task Force — bringing federal-level investigative training to every case.
Mark’s 19 years on the Salem PD means he has extensive knowledge of southern NH — its geography, its court system, and what evidence NH judges and juries need to see. He is licensed under NH PI License #M-2025-0424.
Joseph E. McCain
Joseph brings 30+ years of law enforcement experience to the firm, including 26 years with the Somerville, MA Police Department where he retired as a Lieutenant. His background in NH DHHS adds expertise in family-related investigations. Licensed in both NH and MA.
Why Local Knowledge Matters for Manchester PI Work
Effective surveillance and investigation in Manchester requires knowing the city. The Millyard, the Queen City, the West Side neighborhoods — understanding where people live, work, and socialize makes surveillance more efficient and documentation more complete.
Mark Donahue’s 19 years on the Salem, NH police force and deep professional relationships throughout the southern NH law enforcement community mean we’re not strangers operating from out of state. We know this market.
Areas Near Manchester We Also Serve
We serve clients across the greater Manchester area and all of southern New Hampshire, including Nashua, Concord, Derry, Londonderry, Bedford, Hooksett, Goffstown, Auburn, and the seacoast communities including Portsmouth, Dover, and Durham.
Frequently Asked Questions
Is there a licensed PI in Manchester, NH?
Yes. Donahue Investigative Services (NH License #M-2025-0424) serves Manchester and all of southern New Hampshire. Mark J. Donahue is a retired Salem, NH police officer with 34 years of law enforcement and federal task force experience. Call 603-785-2800 for a free confidential consultation.
What PI services are available in Manchester, NH?
In Manchester we offer cheating spouse surveillance, child custody documentation, workers’ comp fraud investigation, background checks, skip tracing, missing persons locate, corporate investigations, and litigation support. All evidence is gathered legally and formatted for court or attorney use.
How do I hire a private investigator in Manchester, New Hampshire?
Call 603-785-2800 for a free confidential consultation. We’ll discuss your situation honestly, explain what an investigation can document, and tell you whether it makes sense. If you proceed, we’ll design a plan and begin within a few days. No pressure or obligation on the initial call.
How much does a PI cost in Manchester, NH?
Rates depend on the investigation type and hours required. We bill hourly with a retainer and are fully transparent about costs before you commit. Most surveillance cases run $800–$2,500. Call for a free estimate specific to your situation.
Free confidential consultation: 603-785-2800 — NH License #M-2025-0424 · MA License #LP1599A
