Poway student, 12, in custody after allegedly making death threats A 12-year-old student in northern San Diego County has been admitted to a hospital for "evaluation and treatment" after being taken into custody on suspicion of sending an email threatening to kill a teacher and 23 students, the Sheriff's Department said. Detectives served a search warrant Saturday night at the student's home and seized several computers and "numerous" rifles and handguns, the Sheriff's Department said. The student was taken into custody as the warrant was being served. The student is suspected of sending a threatening email Friday night to an administrator at Twin Peaks Middle School in Poway, mentioning 3,000 rounds of ammunition and threatening to shoot to kill a teacher and 23 students. "There is no evidence to suggest anyone else was involved in making the threats and it is believed to be an isolated incident," according to Sgt. Dave Ross. A task force of detectives and computer specialists from local, state and federal law enforcement agencies had tracked the email to the student's home, the Sheriff's Department said. The case will be turned over to the San Diego County district attorney's office for evaluation. Dorner manhunt: Search resumes in Big Bear mountains Dorner manhunt: Officers opened fire on mother, daughter Dorner had history of complaints against fellow LAPD officers Tony Perry in San Diego