They wont be able to file a civil suit until the investigation is over.
From what I've read so far, civil suits have already been filed representing approx. 130 bikers.
Judge says Twin Peaks civil lawsuits can proceed
By TOMMY WITHERSPOON twitherspoon@wacotrib.com Nov 30, 2018
A federal judge lifted a stay Friday in the civil rights lawsuits filed by more than 100 bikers arrested after the 2015 Twin Peaks shootout in Waco and said the lawsuits can proceed.