This has actually literally happened. The sibling comment has the full story, but the tldr is that someone accused of murder brought the actual murder weapon (

This has actually literally happened. The sibling comment has the full story, but the tldr is that someone accused of murder brought the actual murder weapon (a gun) into his lawyer's office and turned it over. Legal and ethical issues swirled, the lawyer ended up giving it to a third party to turn over to the police so he wouldn't reveal where the gun came from. I'm assuming he didn't ask his lawyer whether that would be covered by attorney client privilege. I can't imagine any sane lawyer saying "yes, please bring the murder weapon to my office".