You probably should have talked to the manager at the gym first before filing the police report. Did you lose them or do you think they were stolen from you? Either way, it's been a week and now they are dead. You may as well get a new pair because even if the police take the address and go, the person will probably say they don't have them and they aren't going to arrest them over some airpods. Just suck it up and get a new pair and be careful