Ncis Los Angeles 3x10 -

The shooting was actually faked to get Deeks back into the LAPD undercover to find a mole.

LAPD Lieutenant Bates acknowledges that Deeks has found a "home" with the NCIS team. He encourages Deeks to finally sign the papers and make it official. Ncis Los Angeles 3x10

In this episode, the team works a joint operation with the LAPD to stop an explosives sale. During the sting, Deeks appears to shoot an unarmed man, leading Hetty to "fire" him and the LAPD to cut ties with NCIS. The shooting was actually faked to get Deeks

Despite the pressure, Deeks notably leaves the papers unsigned at the end of the episode, choosing to remain a Liaison for several more seasons. Ncis Los Angeles 3x10