EL CAJON, Calif. — Court documents show an 18-year-old student accused of shooting five people at his high school last week had spare ammunition at home.

Shotgun and handgun ammunition, Navy SEAL literature and hunter safety certificates in Jason Hoffman's name were found at his home following the shooting, according to the documents unsealed Monday.

Police said Hoffman sought to kill a vice principal, who escaped harm during Thursday's attack at Granite Hills High School near San Diego.

But Hoffman, speaking through a shattered jaw Monday, told a judge he was not guilty of attempted murder and five counts of assault with a deadly weapon.

Hoffman, who was shot in the face by a police officer during the rampage, bowed his head, held a cloth to his face and mumbled his plea without looking at the judge.

Public defender William Trainor said his client was "very emotionally upset about the events of the last few days."

Hoffman could face 44 years to life in prison if convicted. He will be held without bail pending a May 10 preliminary hearing.

Earlier Monday, an arraignment was postponed for 15-year-old Andy Williams, who is accused of killing two classmates and wounding 13 people in a March 5 shooting spree at Santana High School, in nearby Santee.

The slightly built boy cast his eyes downward for most of the brief court appearance. His parents, who are divorced, sat in the front row. His mother broke into tears upon seeing Williams.

Williams did not enter a plea.

Under a California law approved by voters last year, Williams automatically was sent to adult court for trial on two counts of murder, which could send him to prison for life. If Williams were to be convicted as a juvenile, he would face a minimum of 10 years in a youth facility.

"We believe the adult criminal system has no constitutional jurisdiction over this juvenile matter," said public defender Randy Mize, who plans to challenge the law.

Outside, relatives of one of the victims, Bryan Zuckor, expressed their opposition to moving the trial to juvenile court.

"The killer in this double murder, whether young or old, is not the victim," said Bryan's aunt, Carol Lynn Briens.

Hoffman's schoolmates, meanwhile, returned to Granite Hills High on Monday for the first day of classes since the shooting. Parents accompanied many students, walking them past patched-up bullet holes and new glass that replaced windows shattered by gun blasts.