It's been in the news in the past month

Feldheim and the unidentified faculty member who received the threatening message were named on pamphlets that were left on a stack of newspapers in a downtown Santa Cruz coffee shop last Tuesday, Clark said. The unsigned pamphlets at Caffe Pergolesi, which printed 13 researchers' pictures and addresses, called them murderers and torturers and said, "Animal abusers everywhere beware."

The name of the researcher whose car was bombed was not on the pamphlets, Clark said.

The attacks may mark an escalation in a series of protests against UC researchers that prompted a Los Angeles Superior Court judge to issue a temporary restraining order against three animal rights groups in February.

In January, a Molotov cocktail exploded on a UCLA researcher's porch. A month later, six people in masks tried to force their way into the home of a UC Santa Cruz researcher and hit her husband on the head, police said.

And at UC Berkeley, officials said 24 animal researchers and seven staffers have been harassed in recent months, with some homes and cars vandalized.
Definitely a DHS issue.