This is too victim complex-y. You can wear tee shirts supporting violence, nobody is going to arrest you.

In the US? I don't think this shirt would violate any law or get you arrested. There was that guy with the "I eat ass" bumper sticker that got arrested for profanity but the state attorney dropped it because it probably is protected free speech.

I think it just means that there is a missing bullet (maybe never fired).

Obviously a reference to Delay, Deny, Defend, a common practice of insurance companies to maximize profit. The excerise is left to the reader to decide what "Depose" means.

"Three fired cartridge cases alongside three unfired cartridges were found at the scene. The words "delay", "deny", and "depose" were written on the cases. "Depose" was inscribed on a casing from a round fired into Thompson, while "delay" was marked on an unfired cartridge ejected as the shooter racked the pistol, possibly to clear a jam or intentionally discard the live round."

https://en.m.wikipedia.org/wiki/Killing_of_Brian_Thompson

https://www.punkwithacamera.com/ is a small screen printer selling them.

Or wear it to your claim rejection review meeting maybe?