Campbell should sue the DNC for civil rights violations, false arrest, and Malicious Prosecution, among other things.
Yep, he should sue everyone and their dog related to this scummy campaign.
If the woman, or any DNC operative crossed state lines to incite a riot, mayhem,, or any type of violence, then they can be prosecuted under both federal and possible state laws.
And the people who paid them to start trouble, i.a. the DNC, Podesta, Koval, etc. can be sued on the grounds that the attacks denied them their First Amendment rights.
Sue, sue, sue!