Steven Stayner was abducted as a young child, and after years of abuse at the hands of his abductor, he managed to not only escape, to to save another victim. 

His brother Cary grew up and developed a meth habit and a penchant for murder. 

It's truely a tale of two Stayners; but does either story have a happy ending? No.

Sources:

The Yosemite Killer: Cary Stayner's Twisted Mind (the-line-up.com)

Steven Stayner - Wikipedia

Cary Stayner - Wikipedia

Cary Stayner, The Yosemite Killer Who Murdered Four Women (allthatsinteresting.com)