Aaron Jessop was a patrol officer, Jessop joined the force during Season 2 and his first appearance was in The Oath. While he thought like a cop, he also was able to think like a CSI. This was evident in "The Oath", where he was able to help Calleigh assess the crime scene and upped the charge and penalty.

Jessop was killed when he opened a cabinet rigged with a hand grenade booby trap at the scene of a Mala Noche shootout, leaving Horatio and the other CSIs distraught at his death. Alexx mentioned he was 27 years old.

Trivia

• Joel West who plays Jessop had previously appeared as Officer Ramirez in the Season 2 episode "Big Brother".