One day after the shootings in Chattanooga, Tenn., authorities have announced the identities of the four Marines killed in the attack: Gunnery Sgt. Thomas Sullivan, Staff Sgt. David Wyatt, Sgt. Carson Holmquist and Lance Cpl. Squire Wells.
Law enforcement officials are still trying to piece together clues a day after a 24-year-old gunman killed four Marines during an attack on a recruitment office and a military training center in Chattanooga, Tenn. Investigators, who now have his computer and his phone, are trying to determine if he's had any contact with extremist groups.