Sellars is the main antagonist of the movie. He was the CEO of Omnicorp and was the driving force behind the creation and development of Robocop. Whilst he was initially less of an antagonist and more of a typical greedy executive, as the film progressed Sellars became more desperate to make Robocop a success, going as far as to threaten Murphy's young son, David, with a gun. Sellars was eventually killed by Murphy in a climactic showdown atop the OmniCorp building