Gov. Gavin Newsom has ordered an investigation into whether Lyle and Erik Menendez pose a public safety risk as part of the ongoing process to determine whether the brothers will be released from prison, where they are serving life sentences for the shotgun murders of their parents at the family's Beverly Hills mansion.

Family members of Erik and Lyle Menendez held a news conference Thursday afternoon and reacted to the latest developments in the brothers' case.

Newsom said there is "no guarantee of outcome" for the investigation, which will be conducted by public safety experts and forensic psychologists.