Jack O'Malley

 is a police officer in Deus Ex: Human Revolution.

Background
O'Malley is a corrupt policeman. Suspected by DCPD's Internal Affairs of dealing with criminals, he is in reality a FEMA operative, realizing their orders to incite a gang war between the Derelict Row Ballers and the Motor City Bangers to shield the Agency'd prison camp at Highland Park, a location where gangs started to expand.

Human Revolution
Jack O'Malley is the center of an objective given by Jenny Alexander. Adam Jensen is asked to find evidence that would incriminate O'Malley.