and erica started running and crying to the teacher and said, don't let him hurt me. >> judith told detective arnold about erica's new fear, men with braids. and there on the walgreens video, detective arnold saw it. the man coming in with james quisenberry, the mystery man, had braids, but the image was still too fuzzy to figure it out. he circled a freeze frame of the man and hoped someone could identify him. then he waited. eight months later, he got some promising news. someone thought they recognized the walgreens guy from another shooting. his name, kenneth williams. >> i think it's him, but then again, the picture on the video isn't real good, but i start focusing in on him at that point. >> then, rick's investigation got lucky again. an unlikely witness came forward