BBM I gotta wonder about this also. My niece and her child lived with me for a short time and the child's father/paternal grandparents would periodically report my niece to DCF for various reasons, accusing her of different things (drug use, neglect, say there was violence in my home, etc). Every time they had a report DCF would come out and talk to my grand-niece, me and my niece, look around my home, etc. Anyway, on one of their visits the caseworker mentioned in passing they did a background check on me. I asked what the extent of the check was and she said they only checked for outstanding warrants and criminal convictions and if my name appeared in internal DCF documents. So if that is standard operating procedure (which I'm going to speculate it is for DCF in abuse investigations) how on earth did they miss EG's criminal history and certainly her history with DCF. My guess...someone either screwed up or got seriously lazy.
