Meat Jackell
Warrick Brown was shot by the Undersheriff Jeffrey McKeen while investigating a crime scene in the episode "For Warrick" (Season 9, Episode 1) of CSI: Crime Scene Investigation.
Season 3, Episode 3 (303) Let the Seller Beware is the earliest one I'm aware of. He takes off his shirt to check the pool at the back of a house where a dead women was found.
No, but in the first episode "Pilot" in a deleted scene, Catherine and Nick are in Nicks car and they start making out but overall NO Catherine and Nick should be together...
Nick Stokes gets hurt in the episodes "Grave Danger" (Season 5, Episodes 24-25) where he is buried alive, "Fannysmackin'" (Season 7, Episode 4) when he is attacked by a group of teens, and "For Gedda" (Season 9, Episode 4) where he is temporarily paralyzed after being shot.
No in one episode they fake his death but no he is still alive :)
Tim Speedle is killed in the first episode of the third season of CSI: Miami, titled "Lost Son." He is shot while investigating a crime scene, leading to his tragic death in the line of duty.
Yes, Jason McCann, the character portrayed by Justin Bieber was shot and killed on a season 11 episode of CSI: Crime Scene Investigation.
He appeared as homegrown terrorist Jason McCann in "Shock Waves (season 11, episode 1 ) and was shot at the end of "Targets of Obsession" (season 11, episode 15).
That's in season 3 episode 16 Heart of Glass
April 3 is the first night back with a total of 6 being shot
Owen Wolf is a guy they dedicated episode 2 of season 1 of CSI. He was a production assistant who was shot in 2000.
Lt. Horatio Caine was shot down in the final episode of season 6.