People must spend way too much time watching Law and Order. Neither the police nor anyone else are going to watch ___insert number of days the rig was in the shop____ days of grainy video to see if they can spot a couple of unidentifiable thieves stealing a camera and a guitar. They are not going to pull the pictures of the suspects off the video and send out most wanted posters to all the post offices across the county. The criminals will not be profiled on America's Most Wanted. A team of detectives will not be canvassing the neighborhood or visiting the local pawn shops looking for the stolen items.
You call the police, they will probably direct you to an internet page where you can enter the details of the crime. This information will be given a unique identifying number and you will use that special number when you file your claim with your insurance carrier. The insurance company will appropriately apply the proper deductibles, assess the current depreciated value of the items stolen and cut you a check for the difference, if any. Sad that it happened, but that is a risk you take any time you leave anything of value in a vehicle. And do you really think the employees of the dealership are going to risk their jobs to steal a guitar????