I honestly would find out who the money belonged to first. I would wait and watch the news. If I found out it was some punk drug dealer I would keep the money. I would enjoy spending every dollar of it - and thats the truth!
(I know I know not all drug dealers are punks)
(If you actually had that thought 'why is she calling drug dealers punks?' then you're probably not even a drup dealer at all huh! You just sell weed
)