I’m sure Adams IDed the prof privately to the poobahs at Berkeley. When a person like SA decides to withdraw 100% of their financial support, they’d want that decision to carry maximum impact. I read Adams’ blog version of what happened, but without doubt there was an up close and personal version between himself and the Berkeley administrators re his financial about face. You can count on that.
That’s fine, law enforcement then his boss in that order. When a state employee (the professor) threatens you, you should file a report with the state police. Since it’s a verbal threat it probably won’t go anywhere, but still on record and if something does happen, the professor becomes a person of interest and their life becomes very complicated.