Cooper was played by Richard T. Jones in Event Horizon.
He is a rescue technician. He is a member of the ship U.S.A.C. Lewis and Clark tasked to find out what happened to the ship Event Horizon, which disappeared for seven years and suddenly appeared in Neptune. They become the help of the scientist who built it, Dr. William Weir.
Once they reach the Event Horizon, they begin to investigate what happened. In time the crew begins to suffer halucinations and is decimated because of the ship and Dr. William Weir, who is under the control of the ship. His captain sacrifices himself to save him and another one from dying, too.
After that he tries to comfort the other survivor after being rescued, who was suffering because of what happened.