Complex sentence: Vattic finds her in an asylum in Vermont and after he rescues her from the asylum, they escape into the sewers, she tells him that the WinterICE team's Commanding Officer Col. Joshua Starke was killed during the mission.
Split into simpler sentences: Vattic finds her in an asylum in Vermont and rescues her. They escape into the sewers and she tells him that the WinterICE team's commanding officer Colonel Joshua Starke was killed during the mission.