Doctor Chaos was hired by Senator Eagin, a government official who wanted to scare away the Justice Society of America when they made Monument Point their new headquarters after Scythe’s terrorist attack. Senator Eagin ordered the good doctor to kill the mayor at Monument Point and threaten the JSA to leave. Doctor Chaos is successful in killing the mayor because the mayor drank from Monument Point’s reservoir which was filled with micro-bombs (explosives no bigger than human blood cells) then activated by remote control.
Doctor Chaos has also demonstrated incredible knowledge, able to roughly predict the actions of others with unerring skill, as well as discern secrets. Where he is getting his information from is unknown.