

Licensed Private Investigators
New Hampshire & Massachusetts
Former law enforcement. 56+ combined years. Court-admissible evidence. Confidential, discreet, and built to hold up under scrutiny.
Donahue Investigative Services & Executive Protection delivers courtroom-ready investigations and professional protective details for law firms, insurers, corporations, and private clients across NH and MA. Our work is led by a former Salem, NH police officer with federal task force experience — the discipline and credibility that hold up in court.
34+
Years Law Enforcement
NH + MA
Dual-State Licensed
Federal
DEA & Task Force Trained
Free
Confidential Consultation
Our Services
Cheating Spouse Investigation
Discreet covert surveillance that documents the truth with court-admissible photo and video evidence.
Surveillance Investigations
Workers’ comp fraud, insurance abuse, and corporate misconduct surveillance for insurers and attorneys.
Child Custody Investigations
Objective documentation of parental behavior and visitation compliance for family-court matters.
Background Checks & Skip Tracing
Primary-source background investigations, people locates, and skip tracing for individuals and businesses.
Corporate Investigations
Employee theft, internal fraud, and due-diligence investigations for NH and MA businesses.
Missing Persons & Litigation Support
Locating people, process serving, witness interviews, and evidence collection for active litigation.
Why Donahue
- Former law enforcement — 34 years, including DEA, ICAC, and NH Attorney General’s Gang Task Force
- Dual-licensed in New Hampshire (#M-2025-0424) and Massachusetts (#LP1599A) — no jurisdictional gaps
- Court-admissible evidence gathered within NH and MA law, with documented chain of custody
- Confidential and discreet on every case — we work for law firms, insurers, corporations, and private clients
- Available to testify — deposition and trial testimony when your case needs it
Areas We Serve
Based in Salem, NH — serving all of New Hampshire and Massachusetts, including Manchester, Nashua, Concord, Portsmouth, Salem NH, Boston, Worcester, Lowell, and the greater Merrimack Valley.
Get the Truth. Get It Documented.
Free, confidential consultation. No pressure, no obligation — just an honest assessment from former law enforcement.
NH License #M-2025-0424 · MA License #LP1599A