The man accused of killing a kindergarten teacher and two students in the Sacramento, California, school shooting has a history of violent behaviour, police said Thursday.
Amber Jansen, a 28-year-old who lived with her mother in the same apartment building as the shooter, had been charged with two counts of murder in the December killing of Lorna LaRose, an elementary school teacher, and her boyfriend, a 14-year old boy, who was also shot.
The accused gunman, Michael Elkins, also faces one count of attempted murder in that killing.
Authorities said he had been living with LaRose’s mother in her home for two months, after his estranged wife told police Elkins began harassing the family in September.
The alleged gunman also used an assault rifle and two pistols to kill two others, including a teacher, who were attending a special-education class in his apartment.
Authorities say the school shooting was the third mass shooting in California in less than two years.
The suspect was shot dead after a two-hour standoff in his residence, which authorities later said was an attempt to flee.
He also died from his injuries.