A convicted pedophile linked to the unsolved murders of four children in the 1970s after a breakthrough in DNA technology has a startling history of sex abuse, court records show. Arch Edward Sloan, who is serving a life sentence for raping a 10-year-old boy in 1983, has been named in the case of the Oakland County Child Killer, who went on the rampage for 13 months. Investigators reopened the case into the murders of two girls and the rape and murders of two boys in 2005 and found strands of hair on two of the victims matched a strand found in Sloan’s car. The man, now 70, has refused to cooperate with investigators, but court documents reveal his frightening history of sexual abuse and how his family feared he had an incurable problem.  READ MORE HERE