Callahan (NYPD)

Callahan is a police detective in the New York City Police Department.

Biography
"Callahan is in Maui, and O'Reilly moved to New Orleans. And none of them know you quit."

- Nandi Tyler to Misty Knight

A detective at the 29th Precinct Police Station in Harlem, Callahan was in Maui at the time of Captain Tom Ridenhour's death.

Allies

 * New York City Police Department - Colleagues