- "Lord Vader, I am a trained investigator with years of experience."
- ―An ISB major to Darth Vader
Detectives, or investigators, were individuals who investigated criminal activity. Generally they were police officers, however, Jedi such as Tera Sinube who were able to use the Force to help piece together the crime, would assist regular police detectives with their investigations, in their capacity as a Jedi investigator. Detectives from the Coruscant Security Force would sometimes be referred to as inspectors. During the reign of the Galactic Empire, Imperial Security Bureau personnel could be assigned as investigators to investigate criminal and rebel activity, as exampled when an ISB major helped Darth Vader investigate a bombing on Coruscant when a Jedi emblem was recovered from a site in the early days of the Empire. In the Imperial Security Bureau, there was also an elevated rank of Chief Investigator.
- Star Wars: The Clone Wars – "Lightsaber Lost" (First appearance)
- Star Wars: The Clone Wars – "Sphere of Influence"
- Star Wars: The Clone Wars – "Senate Murders"
- Catalyst: A Rogue One Novel (Mentioned only)
- Catalyst: A Rogue One Novel audiobook (Mentioned only)
- Darth Vader: Dark Lord of the Sith 8
- Smuggler's Run: A Han Solo & Chewbacca Adventure (Mentioned only)
- Smuggler's Run: A Han Solo & Chewbacca Adventure audiobook (Mentioned only)
- Alphabet Squadron (Mentioned only)
- Alphabet Squadron audiobook (Mentioned only)
- Aftermath: Life Debt
- Aftermath: Life Debt audiobook
- "Hear Nothing, See Nothing, Say Nothing"—Canto Bight
- Canto Bight audiobook
- Star Wars: The Last Jedi – DJ – Most Wanted 1