A DA Investigator is an investigator who works for a District Attorney's office in the DA Investigation Unit. These investigators don't have to be a member of a police department, but most of them are former members. An alternative name for these investigators is called a Detective Investigator.
- Lennie Briscoe (former NYPD Detective) (deceased)
- Chris Ravell
- Hector Salazar (formerly NYPD)
- John Munch (former NYPD Sergeant)
- John Townsend (retired) (SVU: "Manhattan Transfer")
- Brian Cassidy (formerly NYPD Detective)
There are other investigations in several other jurisdictions: