File:Fincher.jpg
Fanart of Cochran's squad as they tried to get him to medical attention.
Private Cochran is a member of Corporal Harland's veteran squad. During the Battle of Sigma Octanus IV, Cochran and his squad encountered Hunter units, and was wounded by a Covenant Grunt's Needler. Harland was able to patch the wound up with biofoam to keep him alive until he could get a medic. Cochran's wounds however did not stop him from saving his squad by shooting down pursuing Covenant Banshees with Private Walker's Jackhammer launcher. With the help of Spartan-117 and other Spartans, the fight on Sigma Octanus IV was a success and Cochran lived to get medical attention.