In handing down the sentence, U.S. District Judge Amy St. Eve said she was troubled by the "escalation" of Johnson's activism over the years and that previous stints behind bars have not seemed to deter him. She also noted that his actions on the mink farm that night caused suffering for many of the animals he professed to want to save. In all, more than 550 of the minks died, many painfully, the judge said.