Who are Lyle and Erik Menendez, and what happened with them?

Lyle and Erik Menendez are back in the news because of their parole hearings. They were convicted of first-degree murder in 1995 for the 1989 killings of their parents. So, who are the Menendez brothers, and what exactly happened with them? #news #lylemenendez #erikmenendez #menendezbrothers