He strangled 18 year old Misty Keckler in 1997, then skipped town.
Eventually he was found working in a San Diego pizza parlor, and ultimately pled guilty to involuntary manslaughter in 1999 for Keckler's death. He was also a registered sex offender for sex crimes against a 14 year old girl.
He only served 13 years in prison for strangling Misty Keckler.
Unless my math is wrong, that means he wasn't out very long before he raped and killed again. (He is being charged with rape in addition to killing Heather Jackson & her kids.)
According to this 1998 Blade article he could have faced a term of 15 years to life in prison for Keckler's death.
Instead, he was out after 13 years to kill again.