Jebson remained in prison until his death in April 2015 .
30 years after the murders , Jebson confessed to the crimes and was already serving a life sentence for the 1974 murder of 8 - year - old Rosemary Papper .
Jebson remained in prison until Jebson 's death in April 2015 .
30 years after the murders , Jebson confessed to the crimes and was already serving a life sentence for the 1974 murder of 8 - year - old Rosemary Papper .