Roy Charles Waller, 58, was arrested as he arrived at work in Berkeley on Thursday.
Neither UC Berkeley nor city of Berkeley officials could have withheld police protection from Kiara Robles because of her political beliefs or sexuality, the judge ruled.
A gun sighting scared the campus community Wednesday morning.
Two hikers spotted the body of 23-year-old Brian Lewinstein a month after he slipped taking a photo of a waterfall in the Umpqua National Forest.
New state data show the water was found to contain more than 40 times the legal amount of lead, but no students appear to have been exposed to it.
Berkeley Unified is among districts embracing "career technical education," despite uncertain funding and a stigma they want to erase.
Berkeley Police responded to the threat, which was scrawled in a boys' bathroom.
Soaked by the rain, hundreds of students at Berkeley High and elsewhere walked out of class and mourned for the young victims of mass shootings.
Berkeley police are investigating whether the threat is credible, and will be stationed around the campus through the evening, said BHS Principal Erin Schweng in an email.
A small volunteer group is building a radio communications network so Berkleley neighborhoods can communicate during emergencies when the power grid and internet are down.
The arrests happened at the end of Red and Gold day, the culmination of Unity Week, which used to be known as Spirit Week.
In recent months, the city and campus community have worked together to improve fire safety in large group homes, in particular, before special events or parties.