DEADSHOT

Deadshot is often a hired assassin, regularly boasting to "never miss." He is capable of using a large variety of weapons, but prefers using a pair of silenced, wrist-mounted guns. He is most commonly associated with the Suicide Squad, although he is also a regular member of the Secret Six.

He initially appeared in Gotham City as a new crimefighter, but was revealed to be an enemy of Batman when he attempted to replace the Dark Knight. When this plan failed, he attempted to become king of Gotham's Underworld. Batman and Commissioner Gordon publicly exposed his plot, and he went to jail.

More on this character soon, for the mean time read character's bio here:
http://dc.wikia.com/wiki/Floyd_Lawton_(New_Earth)