Originally Posted by sans meaning
That guy was able to prove it was his bike. OP can prove nothing. He may know beyond a shadow of a doubt the computer is his but that is worth nothing to the cops.
if you ever stole his computer didnt bother formating it, it would be very easy to prove its his.
Here is how it should go.
Convince seller to show up at public place with laptop.
Once there, take a look, power it on, log-in. Oh, this is my stolen laptop. Here are my photos. See this one, that's me.
Friends come out of shadows and hold the seller there till police come out.
Seller doesnt sound too smart. Id say this would be the case.