SACRAMENTO, Calif. (AP) — The gunman who killed his three daughters, a chaperone who was supervising his visit with the children and himself in a Northern California church this week was in the United States illegally, immigration officials said Friday.

David Mora, 39, overstayed his visa after entering California from his native Mexico on Dec. 17, 2018, on a non-immigrant visitor visa, U.S. Immigration and Customs Enforcement spokeswoman Alethea Smock told The Associated Press.