(December 18, 2019, 11:36 AM EST) -- DENVER — Two Colorado residents filed a class complaint on Dec. 16 in the U.S. District Court for the District of Colorado accusing Frontier Inc. of failing to protect its passengers from passenger-on-passenger sexual assaults (Lena Ramsay, et al. v. Frontier, Inc., No. 19-3544, D. Colo.)....