Menendez brothers score crucial legal victory in decades-long fight as they await potential freedom

As infamous killer brothers Erik and Lyle Mendendez wait for their August parole hearing, they have scored a legal victory on another front, this time in the form of new evidence they say could have led to their acquittal. 

The pair, who admitted to killing their parents, Mary "Kitty" and Jose Menendez, in a bloody 1989 shotgun massacre inside their Beverly Hills home, claimed for years that their actions were self-defense stemming from a lifetime of physical and sexual abuse.

A July...