Colonel Krall was part of the Iranian Secret Police. Before working there he used to hunt wild animals all over the world and skin them. In the Secret Police he hunted and skinned men. He was believed to be killed by John Probe when the two fell out of a window of the Presidential Palace.
Krall suffered severe injuries in the fall, but survived. He reappeared raiding a temple in the South American jungle. He tried to kill Probe with a sonic weapon known as 'The Death Trumpet'. The temple, however, turned out to be an alien spacecraft and the sonic weapon jolted the system into restarting. As the spacecraft took off, Krall was killed in the blast from the engines.