Donald Blom has a history as a repeat sex offender against young girls. He was convicted five times in the seventies and eighties for sexually assaulting and in some cases kidnapping of girls ages 13 to 16 in the Twin Cities area. The longest continuous period he served in prison was four years after committing three sexual assualts in the 1980's. Criminal histories like Blom's are of particular interest to the group WATCH, which monitors felony-level sex crimes against women and children in Hennepin County. Executive Director Jacqueline Hauser says sentences have gotten tougher of late, but the changes came too late to protect Katie Poirier.