DOES A killer have a conscience? That's what Edward Harold Bell wants us to believe. Now serving a 70-year sentence for murdering a Houston-area Marine vet in 1978, Bell has come forward asking for immunity and ready to plead on the murders of as many as 11 young girls in the Houston-Galveston area in the early to mid 1970s. Among the suspect victims are, Sharon Shaw, pictured left, and Rhonda Johnson, right. According to the Houston Chronicle six different agencies: the Harris County Sheriff's, the Pasadena PD, the Galveston PD, the Galveston County Sheriff's, the Brazoria County Sheriff's Office and 