DNA is useless unless the perp had previously been involved in some kind of crime that would require him giving a sample. Very few people have their DNA on file.I hope they get DNA from somewhere. Unless he was wearing gloves I would think they could get touch DNA. Don't know much about it, I just think it's pretty cool that they can get DNA samples from all those convicted of misdemeanors. I hope it helps solve a lot of cases. I think it especially helps in solving cold cases. Jmo