One man is believed to have stabbed two homeless people (one died, and the other is critical) and one university student (died):
A third stabbing in less than a week forced an hours-long shelter-in-place order for the sprawling UC Davis campus and large swaths of downtown Davis early Tuesday as authorities conducted a yard-to-yard search for the assailant.
They came up empty, and by late morning, as FBI agents arrived to assist with the investigation
...
The chief said the suspect had been spotted by several homeless people camping near the intersection of 2nd and L streets. He engaged in conversation with them before walking away, then returned a short time later and stabbed a woman in her tent repeatedly.
“The suspect didn’t seem to care that there were several witnesses”