NYS DOS License #11000169770 Licensed • Bonded • Insured
New York Intelligence Agency Est. 1989 · NYC
A private investigator's tools. Camera, magnifier, case map and notebook. New York Intelligence Agency
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.

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.

Not sure which service you need?

Most people who call us cannot name the service they need, and that is fine. You do not have to. Describe what happened in plain words and we will tell you which practice area fits, or tell you honestly that none of them do.

Cases also cross over more than people expect. A matrimonial case often turns into a financial matter once assets start moving. A corporate theft case usually needs surveillance and a background check together. A missing person case can start as a records search and end as a welfare check at a front door. You are hiring the agency, not a single product, and the plan changes as the facts do.

Three things shape every quote. How many hours in the field the case needs, how many investigators it takes to stay unseen, and whether the result has to survive a courtroom. Evidence built for court costs more than answers built for peace of mind, because the documentation standard is higher and someone has to be able to testify to it later.

Every service on this page is run by a licensed New York investigator. You can check our license, number 11000169770, at the New York Department of State license search. If your case is outside what we do well, we will say so and point you somewhere better. The first conversation is free.

No. 01

Matrimonial Investigations

Discreet investigation when you need to know the truth about a spouse or partner.

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No. 02

Domestic Surveillance

Surveillance involving family, children, marital concerns, or the home. Handled with the discretion that protects everyone involved.

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No. 03

Corporate Surveillance

Protect your company's assets from internal theft, fraud, and corporate espionage with discreet workplace and field surveillance.

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No. 04

Missing Persons

When the police investigation ends, ours begins. Specialized missing persons investigations across New York and internationally.

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No. 05

TSCM & Debugging

Technical surveillance counter measures. Bug sweeps and electronic counter surveillance for executives, attorneys, and high value targets.

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No. 06

Financial Fraud

Forensic investigation of embezzlement, securities fraud, partner theft, and complex financial misconduct.

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No. 07

Insurance Fraud

Surveillance and documentation of fraudulent claims for insurers, defense counsel, and self insured corporate clients.

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No. 08

Criminal Background Checks

Pre employment, pre marital, and pre business background investigations by licensed investigators. Far beyond what online services give.

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No. 09

Identity Theft

Identity theft investigation, recovery, and source tracing when standard remediation isn't enough.

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No. 10

Overseas Investigations

International investigations across Europe, Asia, the Caribbean, and Latin America with vetted in country resources.

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No. 11

Polygraph & Lie Detection

Certified polygraph examinations and voice stress analysis administered by qualified examiners under controlled conditions.

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No. 12

Last Minute Surveillance

Urgent, 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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When you need answers,
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