When I heard the investigators on the History Channel talk about Santa Cruz being part of the Bay Area and "close" to Vallejo I couldn't help but laugh.
Most serial killers like to work within a comfort zone. They look for places with vulnerable victims that are in a close proximity to their home. Studies demonstrate that killers will most likely work within 1.25 miles of their home. If you look at the proximity of the first two Z murders in Vallejo and Benicia on a map it's difficult to imagine that the killer was from anywhere but that area. It's why Arthur Leigh Allen has always been a favorite suspect of law enforcement, investigators and journalists despite being ruled out pretty thoroughly by the evidence. Leigh was a weird guy with guns and knives who lived a few miles away from the murder. It's also why I'm struggling with Ross Sullivan despite really liking him as a suspect.
Sullivan matches the composite, has strong connections to the Riverside case and some of the circumstantial evidence that's popped up recently is hard to ignore. But then I put myself in Sullivan's shoes in Santa Cruz when these murders took place and it doesn't make any sense.
The drive from Ross' residence in the Santa Cruz beach flats to Vallejo is not just a slog, it's downright treacherous, especially at night when Z did his work. Highway 17 is noted as one of the most dangerous stretches of road in the entire country. Additionally, if you think about what Santa Cruz was like in 1968, the idea that Z would go to Vallejo or Benecia to find a couple of kids to kill is just ridiculous. UCSC was basically a summer camp in the woods in 1968. Most of the campus wasn't even built and the culture was beyond bohemian. Kids were off in dimly-lit woods getting high and getting down left and right. If you wanted to find a perfect killing ground to pick off the unsuspecting and highly vulnerable young couples Z targeted, you couldn't find a better place than Santa Cruz in the 1960s. It's why Ed "The Coed Killer" Kemper had such a blast in that town during the same time period.
If Sullivan was Z, he would have driven nearly 100 miles through the most dangerous highway in the region to a respectable family town like Benecia where one couple was necking in a car when he could have driven 3 miles to a Bohemian turkey shoot in the woods filled with half-naked kids whacked out on acid. It's ridiculous. Santa Cruz is not the Bay Area, it's not Vallejo and it and it sure as heck isn't within 1.25 miles of any of the murders.

