Who knows... you do hear of cases where crimes are pinned on innocent people, seemingly because some DA would rather prosecute anybody than leave it 'unsolved'.
I called the police, they interviewed me. Came back a few days later and did it again. At the time, what I remember feeling like was that they were trying to figure out if I made it up and kept the money rather than actually catching the person who had a gun to my head. I was pissed.
You watch too much TV. I know it's hard, but when talking about real life law enforcement, try to forget everything you've ever seen about it on TV. It's about as accurate as the hacking scenes in NCIS.
The justice system in the US is completely broken. You should be very afraid.