Browse the Top 5 Private Investigators Serving Washington, DC

Since 1967, our main goal is to supply our clients with all the information they need to make the correct decisions about critical issues. We provide discreet private investigation services in Los Angeles, Beverly Hills, San Diego, San Francisco, Houston, Denver, New York City, Washington DC and Virginia, USA and the World. Do you suspect your spouse, partner, business associate or employees is being dishonest? We investigate cases regarding; Criminal, Civil, Personal, Business or missing persons as well as extensive backgrounds and Due Diligence. Est. 1967. Call or email us now, ASAP.

Capitol Process Services provides expert legal document delivery across Washington D.C., Maryland, and Virginia with nationwide capabilities. Specializing in difficult serves and time-sensitive cases, we combine 40+ years of experience with modern technology for reliable proof of service. Our team handles evictions, subpoenas, litigation documents, and government agency service with strict legal compliance.

Dinolt Becnel & Wells Investigative Group is a Washington, D.C.-based firm offering litigation support services to attorneys and insurance companies. We specialize in evidence gathering through surveillance, forensic interviews, and digital investigations, aiding civil, criminal, and insurance fraud cases. With a 20-year track record, we combine ethical practices and technology to deliver actionable insights for legal success.

Investigative Group International provides global risk advisory services specializing in due diligence, litigation support, and political investigations. With 40 years of experience since 1984, we deliver actionable intelligence to corporations and individuals facing complex challenges. Our Washington, D.C.-based team combines investigative rigor with strategic insights to help clients make informed decisions in high-pressure environments.

The Detective Agency provides expert criminal defense investigations, litigation support, and corporate fraud services. With over 30 years of experience, we assist attorneys and individuals in uncovering evidence, challenging prosecutions, and protecting rights. Our nationwide and international reach ensures comprehensive support for complex legal cases.