What happens if I unknowingly bought a stolen cellphone?

[calmvisitor965]

About three months ago I bought a cellphone off of fb. Fb has these sales that you can buy in the community... Anyway I bought a Samsung from this guy and met him at Walmart. I can't retrieve the information that I bought from this guy cause I'm believing we did the transaction through text message and can't remember the date. Well my boyfriend and I waited to activate it at page plus until his other contract was over. So we go In to activate it. the guy tells us that we can't have the phone back because it was reported stolen they asked me were I got it. I told them etc and I told them I don't know exactly who I bought it from because it was a one time meet. So I immodestly went up to the state police and I told them my situation they said I should not worry about it. So I didn't. Then two days ago tribal police contacted me saying they need to talk to me about a stolen cell phone. And wanted me to write a police report so I did. What do I do? Scared