Two years ago, my 20-something son was put in jail along with 10

Wildwood / Philadelphia - Two years ago, my 20-something son was put in jail along with 10 others for fighting in a bar. While in there, one of the cops stole my son's gold chain and cross which belonged to his late dad and was very costly. When released after a few hours, the cop said he couldn't find it. We couldn't prove its loss.