I found an iphone 5 wiped completely, stuck in setup mode what can i do, its logged into apple id but i don't know who's it it?

I found an iphone 5 wiped completely, stuck in setup mode what can i do, its logged into apple id but i don't know who's it it?

Take it to the police.

Anything else is a criminal offence - it's stolen property. "Theft by finding" is still theft.

(And it is totally impossible to bypass the apple login - that's the basic anti-theft system).