CTaylor, I think you are right. From searching Ancestry all lead to that Annette as correct. It seems her son still lives there with his wife. I found her FB page and photo looks as if the man could very well be Johnnie's son.
Quick update and I hope I don't forget something. This is what I believe to be true, I think Bobby88 agrees, I can share all stuff if you PM me. I do not want to post all the stuff here unless others want me too.
From obituary we found name of Johnnie's parents, siblings and grandmother. He was one of 7 kids. I have an address where Herrera's lived, not sure if I can post it. It is less than 11 miles from what was until 1997, Camarillo State Mental Hospital. It was not a nice place:
I think Kraft's Oxnard entry was well after Johnnie disappeared. I cannot find any list of Kearney's victims, timeline could work.
I worked with a guy who went to same high school as Johnnie, probably a couple grades ahead of him. I emailed him to see if he knew the Herreras.