Daniel Castillo, 25, of Apple Valley, California, died after a violent altercation on June 7, 2021. According to investigators, Castillo forcibly entered his ex-girlfriend’s Hesperia home through a window and encountered 62-year-old Daniel Cook. The two men became involved in a physical confrontation during which Castillo suffered multiple stab wounds and later died at a local hospital despite life-saving efforts.

Cook administered CPR until emergency responders arrived and has said his actions were in defense of life and property. The San Bernardino County Sheriff’s Department Homicide Detail investigated and submitted findings to the San Bernardino County District Attorney’s Office; no arrests were made at the scene. Detective Francisco Demara of the Specialized Investigations Division handled inquiries and authorities asked the public for additional information.

What information about the moments before the altercation or other witnesses has not yet been made public?