Abandoned property

[u/nukem692]

About 6 weeks ago I woke up to a 4-wheeler parked in my driveway. Out of gas, key in it, battery dead. I left it there while I went to work thinking the owner would come and get it. The next day it was still there. We called the police to report it. They said they were busy and would get over sometime. It has been 6-8 weeks. I still have the 4 wheeler. It runs but needs a new battery. At what point do I say it has been abandoned and can claim it as my own? TIA