Kurtis Stryker

History
Stryker's biography screen in Mortal Kombat 3 revealed that he was the leader of the Riot Control Brigade when Outworld's portal opened over New York City. He attempted to keep order among the populace in the ensuing chaos, but soon all human souls were taken by Shao Kahn with the exception of those that belonged to the chosen warriors. Stryker did not understand why he had been spared until he received a vision from Raiden, instructing him to head west in order to meet with the other chosen warriors and learn about the importance of his survival.Although he did not wish to be one of the few souls that was spared, he entered the fray with the intention of avenging the lives of the innocent that he had vowed to serve and protect.Along with the other warriors, Stryker assisted in liberating Earthrealm from Shao Kahn's clutches

Description
Stryker was introduced in Mortal Kombat 3 as a somewhat stout-looking man sporting a very urban design with a white-blue shirt, combat boots, gunbelt, black police pants, and a backwards cap. However, his appearance changed in Armageddon into a more serious-looking and modernized policeman. Originally described as being a leader of the Special Riot Control division in the New York City Police Department, he uses firearms and other modern weapons, in contrast to the normal fighters, who use magic, or robotic techonlogy. In his Armageddeon ending, Stryker defeated Blaze, iving him the power to become a supreme vigilante, and strike down the wicked all on his own.

Source: http://mortalkombat.wikia.com/wiki/Kurtis_Stryker