Andy Ngo’s lawyer says that she plans to sue “everybody” related to the assault on her client that occurred last Saturday. Ace has an excellent summary this angle of the story thus far.
The AntiFa thugs who assaulted and robbed Ngo need to be brought to justice as an example to their comrades (I use that term on purpose). Given the failure of law and order in Portland, a civil suit for damages may be the only way to hold them accountable.
IANAL, but it seems to me that Ngo may also have a viable federal civil rights claim against Portland and several of its public officials.
He may also have valid claims for defamation against a wide range of people and organizations who may have been operating with a reckless disregard for the facts.