Which location?
I would think that even if they did cut the wire to stop the siren from going off they would try to fix it before giving it back to you. Sounds suspicious to me..pretty clever actually. Talk to the manager, but don't go in and say: "Jason Weaver cut my wire and I think he will come and steal my stuff!". Tell him that the siren from the alarm has not worked since you took your vehicle in last time and you would like to know why. Don't mention that you saw a cut wire, etc. Let them find it, or "find it" while they are standing there. Ask the manager if someone cut the wire to silence the siren, then go from there. Mentioning Jason Weaver specifically or the assumption that he wants your stereo may make Jason want to come pay YOU a visit. For piece of mind tell them you are moving and want to update your address, then don't go back.
