Stephanie Brown and I5 strangler

There's the I-5 killer (Randy Woodfield) then there's the I-5 strangler who is the I-5 Strangler? Stephanie Brown dropped her friends off in July 1986 late one night - they told her to take I-5 North and don't get lost on I-5 South - and she did what happened next was horrific... and investigators had to look for her and others in the summer of 1986 and then in 1987 he picked up - who was he and why were these girls missing to be found dead on long lonely stretches of road?