The police could do nothing about him parading around naked because Berkeley had no public nudity laws. As long as he wasn't creating a disturbance, they could nothing.
The University of California, Berkeley did finally get involved. But only after a couple of ladies filed sexual harassment complaints against him. The naked guy had not interacted with these women nor threatened them but they claimed that his constant nudity was disturbing them. I don't remember exactly what action Cal took but it was pretty trivial.
I'm not surprised to hear that he committed suicide. Obviously, he was a pretty disturbed man.
Berkeley being Berkeley, I'm sure they weren't concerned with the public nudity, but you'd at least think they'd consider hygene issues. Who'd want to sit in the same classroom seat that naked, sweaty-ass guy sat in before you?