Apache Gunhawk

Two brothers grow up in different worlds. One is raised as an Apache called Hawk and rides with Geronimo. Shamed out of the Apache Nation, he becomes a scout for the U.S. Cavalry. He becomes disillusioned with the army and leaves to become a bounty hunter with a reputation for never bringing prisoners alive. He become known as the feared Apache Gunhawk.
The other brother, Tom, is raised by the outlaw leader Bill Noonan and follows in his adoptive father's footsteps.
He is pursued by the Apache bounty hunter and a U.S. Marshall who is unaware of his relationship to both brothers.