The Menendez brothers were denied parole. These are the factors that are keeping them behind bars

Erik and Lyle Menendez were denied parole by a California board this week after decades in prison for killing their parents in 1989 at their Beverly Hills mansion.

​ Erik and Lyle Menendez were denied parole by a California board this week after decades in prison for killing their parents in 1989 at their Beverly Hills mansion. Read More Breaking News, Latest News and Videos | CNN