Mark - As a police officer for 28 years I can tell you that the officer who lost that badge, however it happened, would be extremely happy to get it back. It's not easy to earn a detectives badge. If I were you I wouldnt have it in my possession unless you had an active ID card to verify who you are. Rikers is not a nice place. Do yourself a favor and see if you can locate the owner. I'd look into it IF you want.

Ciao,
Bill Romano R-6330