I don't know about the details of this prosecution, but having served on juries, it is important to remember than "not guilty" is a finding that the government

I don't know about the details of this prosecution, but having served on juries, it is important to remember than "not guilty" is a finding that the government didn't meet the burden of proof, not necessarily a finding of actual innocence. That article would certainly suggest that they were prepared for violence, even if acquitted on the most serious charge.