I dunno if the mug shots are acurate or the same person, but I would try to get exif data on the pic to find out so you can see the date it was taken. As for the dreads v braids here is what I know about dreads: you have to cut them out or wait for them to grow out. There's no combing them out because to make your hair dredded you have to matte the hair and tangle it. (One of my good friends from college has dreds) So if it is him, I would make sure the dates are far enough apart for him to re-grow hair and have it braided- OR the braids he could have had first, but not dreds. You can detangle braids but NOT dreds. So the braid pic would have to be previous to the dred pic.
and there's the facts on dreds.