All authorities have to go on are the few clues left behind -- a three-page suicide note and a photo taken of the scenic view from atop Mount Diablo just moments before the unthinkable happened.
Sheriff's investigators say that unthinkable was a murder-suicide between a mother and son.
Fifty-one-year-old Judith Williams drove her 16-year-old son Adam to Mount Diablo last Friday afternoon, shot him in the chest and head and then turned the gun on herself.
When park rangers found them later that night, they were both dead.
"She had taken steps to acquire a firearm, she had a dog euthanized, put a couple of cats in shelters and pretty just clearly in her letter described her reasons for why she was going to do this," Contra Costa County Sheriff's Department Captain Daniel Terry said.
Adam was a junior at Las Lomas High School in Walnut Creek and a promising member of the track team.
In her suicide letter, Judith Williams said she was having financial problems.
Adam's father lives in Sacramento; he says there was not a custody dispute.
"She was obviously a very troubled person and she did this for reasons that I don't think people who are thinking rationally can even get their heads around," Jim Williams said.
Now he, like everyone else, is struggling to make sense of it.
Investigators are not looking for any other suspects in this case but an investigation into the incident is ongoing. Anyone with any information on the case is asked to call the Investigation Division at (925) 313-2600.
Memorial for Adam Williams
Friday, July 24, 2009
Mt.Vernon Memorial Park
8201 Greenback Lane
Fair Oaks, CA 95628