I truly dont know this so I am just asking. One time long ago in another life I was taken to the Columbus Ohio PD and was questioned all day about an armed robbery. I was never arrested and it was cracking me up because when the detective was saying I robbed somewhere I was at work 200 miles away. It really cracked me up too because he asked me questions about other crimes I did not even know what or where they were talking about. I kept telling the detective to call where I work and ask them. anyway finally after wasting several of his and my hours he just walked out and told me to go away. Course I had no money and they were keeping my buddy (who had all the cash) for outstanding traffic violations. How much evidence do they have to have to arrest you and swab your DNA? I am pretty sure that cop would have taken anything he could have got. That damn detective was going to bust me for something, but it was my first time in his stinking little town so he got nuthing. Oh and by the way, a couple of cops paid for my bus ticket home even though I told them I would never come back to their stinking town. I haven't yet I dont think.