NCIS: Los Angeles' Eric Christian Olsen is making Deeks fans nervous.

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The LAPD detective is facing down an internal affairs investigation, and this nerve-wracking storyline will come to an end in the aptly titled episode 9, "Internal Affairs." Bearing this in mind, fans were understandably worried when Olsen posted his character's mug shot on Thursday.

 Exclusive first looks at Deeks' Mugshot. Nothing more dangerous than an desperate, innocent man. #ncisla

A photo posted by Eric Christian Olsen (@ericcolsen) on Nov 5, 2015 at 10:19am PST

While the timing indicates that Olsen could be referencing the LAPD investigation, the actor didn't specify. The shot could come into play as part of some undercover work, such as in Monday's "An Unlocked Mind," or it could stay on hold until well past episode 9.

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It is currently unknown why LAPD is investigating their NCIS liaison, but Olsen believes his character is in major trouble.

"I think he's covering something up, something catastrophic," Olsen told Entertainment Weekly. "I think he probably gets sent back to LAPD at some point. I think he's hiding it from everybody, he's been hiding it from himself. Whatever it is, I only hope he did it for the right reasons."

Find out more when NCIS: LA airs Mondays at 10 p.m. ET on CBS. Click the video below to see a preview for the series' next episode, "An Unlocked Mind."