Probably toss it/dump it. This happened to me years ago near Brown University campus. Right in my parking lot. They saw an old laptop bag that was empty except for a couple pieces of junk mail. I hadn't even thought to hide the laptop bag or bring it inside because it was so unimportant. They smashed my window and a few days later a very kind person found the bag on the side of Angell St. and brought it back to me.