All Services
Investigation services from New York's most experienced private detective agency.
Eleven core practice areas, all personally directed by David Schassler. Every case begins with a free, confidential consultation.
Eleven core practice areas, all personally directed by David Schassler. Every case begins with a free, confidential consultation.
Every service here is handled by a licensed New York private investigator. Whether you need a private detective for a personal matter or last minute surveillance for a business problem, NYIA has done it since 1989.
Discreet investigation when you need to know the truth about a spouse or partner.
Learn moreSurveillance involving family, children, marital concerns, or the home. Handled with the discretion that protects everyone involved.
Learn moreProtect your company's assets from internal theft, fraud, and corporate espionage with discreet workplace and field surveillance.
Learn moreWhen the police investigation ends, ours begins. Specialized missing persons investigations across New York and internationally.
Learn moreTechnical surveillance counter measures. Bug sweeps and electronic counter surveillance for executives, attorneys, and high value targets.
Learn moreForensic investigation of embezzlement, securities fraud, partner theft, and complex financial misconduct.
Learn moreSurveillance and documentation of fraudulent claims for insurers, defense counsel, and self insured corporate clients.
Learn morePre employment, pre marital, and pre business background investigations by licensed investigators. Far beyond what online services give.
Learn moreIdentity theft investigation, recovery, and source tracing when standard remediation isn't enough.
Learn moreInternational investigations across Europe, Asia, the Caribbean, and Latin America with vetted in country resources.
Learn moreCertified polygraph examinations and voice stress analysis administered by qualified examiners under controlled conditions.
Learn moreUrgent, short notice surveillance for when the window is today, not next week. Deployed fast and documented to the same standard as every case.
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