Robert Muldoon was Jurassic Park's game warden. He was from Kenya, and had been a long-time employee of John Hammond, working at Hammond's wildlife preserve in his homeland. A very cautious and levelheaded man, Muldoon was of the opinion that the park's Velociraptors were too dangerous to be kept, and should be destroyed. He especially felt this way after a terrible incident in which an innocent worker was killed, despite Muldoon's best efforts to save him.
When the power went out, Muldoon took a gas-powered Jeep at Hammond's request and, along with Dr. Ellie Sattler, went looking for their stranded friends. They found one Explorer abandoned, the other crumpled at the base of a tree, and a badly wounded Dr. Ian Malcolm. The Tyrannosaur appeared, but Muldoon was able to outrun it in the Jeep, getting himself, Ian, and Ellie to safety.
Later, when Ellie went to the generator shed to get the power back on, Muldoon went with her. They discovered that when Ray Arnold had done an emergency shutdown to reboot, it had turned off the fence around the Velociraptors' pen, allowing them to escape. Muldoon covered Ellie's flight to the shed, and then took it upon himself to hunt the alpha female Raptor. However, the hunter became the hunted, as Muldoon realized too late a second Raptor was beside him. He had no time to react before the animal sprang from the bushes and tore him apart.