Although Tlaib has never lived in the West Bank, she still has relatives in the area and is widely seen as a local hero.
If convicted as charged, Girard Damian Saenz, faces a maximum sentence of more than 40 years in prison, prosecutors said.
Brandon Clark, 21, stabbed himself in the neck before police took him into custody.
Authorities think Jacqueline Crayton, then 71, suffered a non-life-threatening fall in 2016 and died a few days later.
Southern California Gas Company confirmed that one of its employees died in the blast at the Murrieta home.