Police: Man In Custody In Colorado Over Alleged Threats To UCLA

A former lecturer sent a video and manifesto referencing a mass shooting, threatening the school's philosophy department. Suspect Matthew Harris also sent disturbing emails. Although authorities had no evidence of Harris being in California, in-person classes were canceled as a precaution.

What was included in the video sent by the former lecturer?

What was the content of the manifesto mentioned in the text?

What event prompted the campus alert regarding Matthew Harris?

What was the indication regarding Matthew Harris's location?

What actions were taken by the school in response to the threat?