Two teen boys have been charged with additional counts in their alleged nearly yearlong plot to “massacre” students at staff at South Pasadena High School, authorities announced Tuesday.
The boys, ages 16 and 17, were additionally charged Monday with one count each of conspiracy to commit murder and conspiracy to commit assault with a deadly weapon, the Los Angeles County District Attorney’s Office announced.
They had been already charged in August with one count each of making criminal threats. Their identities have not been released because they are underage and being prosecuted in juvenile court.
The boys planned a shooting at the high-achieving school in an affluent Los Angeles suburb between Sept. 1, 2013, and Aug. 16, 2014, the DA’s office stated Tuesday. Authorities had not previously described the time span of the alleged plotting, only saying the boys were in the early stages of making plans.
The boys’ arrest was announced by police on Aug. 18, just a few days before the fall semester was scheduled to begin.
They planned “to kill as many people as possible” in a “massacre,” the city’s police chief said after their arrest.
The two boys discussed using automatic weapons, knives, bombs and wearing bulletproof vests, according to police Chief Arthur Miller.
They allegedly shared their plans with another teen and threatened to kill him or her on Aug. 16, according to prosecutors.
The boys have denied the charges against them in Pasadena Juvenile Court. They were scheduled to return to court Sept. 23, with a trial date set for Sept. 25.