Yusef Ryder was a member of the Brotherhood of Doubt.
Not much is known about Ryder's early life or where he was born but it was revealed that he had been in prison many times for committing numerous crimes and also served at Jessop Correctional Institution.
While there, Ryder converted to Islam.
NCIS Season 10Edit
Having skipped a meeting with his parole officer, Ryder was on camera, robbing a gun store before he chose to flee the scene, Ryder having stolen the gun that had been used to kill Petty Officer Daniel Coyne.
Ryder later took shelter in a warehouse but upon seeing NCIS Special Agents Leroy Jethro Gibbs, Anthony DiNozzo and Eleanor Bishop as well as DOD agent Hollis Mann, Parsa, presumably fearing that Ryder would talk, set off a bomb that not only destroyed the warehouse but killed Ryder instantly.
Ryder's body was later taken back to NCIS where NCIS Medical Examiner Dr. Donald Mallard correctly theorized that Ryder was not a martyr, leading Gibbs to realize that Parsa had been personally responsible for the explosion.