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Police detail 12-year-old gunman's rampage, but not motive

SPARKS, Nev.The student who wounded two classmates and killed a teacher and then himself on a Nevada middle school campus was 12 years old.

A Sparks Middle School student cries and is comforted after being released from Agnes Risley Elementary School, where some students were evacuated to after a shooting at SMS in Sparks, Nev. on Monday, October 21, 2013, in Sparks, Nev. AP

District police say the boy brought the weapon used in the Monday morning spree from home. They are still working to determine how he obtained the 9mm semi-automatic Ruger handgun.

Authorities say they are withholding the Sparks Middle School student's name out of respect for his family. But School District Police Chief Mike Mieras released the seventh-grader's age at a news conference Tuesday.

Police say the boy's parents are cooperating with them and could face charges in the case.

Sparks Middle School
Law enforcement gather in the parking lot after a shooting at Sparks Middle School, Oct. 21, 2013, in Sparks, Nev. A staff member was killed and two students were injured after a student opened fire at the Nevada middle school. The suspected gunman was also killed. David Calvert/Getty Images

Also at the new conference, police lauded the actions of 45-year-old math teacher and former Marine Michael Landsberry. They say he tried to stop the rampage before he was fatally shot in the chest.

At 7:15 a.m. on Monday, the student shot a fellow student in the shoulder, walked toward Landsberry, shot him in the chest, then walked south and shot a second fellow student in the stomach before finally turning the gun on himself.

"I heard a loud bang, like really loud, it made my ears ring," 13-year-old Michael Anduja told CBS News' John Blackstone. He said he turned and saw the shooter aiming a gun at students.

"There were a couple kids trapped in a doorway. They had nowhere to go. Mr. Landsberry stepped in front of them and saved them," Michael said. "He (the shooter) was aiming at them and Mr. Landsberry stood in front of them and the kid shot him."

"When I found out he was dead, it was pretty heartbreaking," Michael said of Landsberry. "I can't imagine school without him."

The popular math teacher was not the only hero, Michael said. He said some students who were out of the line of fire ran back to help classmates who were too frozen with fear to run.

Michael Landsberry, a popular math teacher at Sparks Middle School,
Michael Landsberry, a popular math teacher at Sparks Middle School, was shot and killed by a student gunman as he tried to protect other kids, police said. CBS News

At least one witness has pointed to revenge being a possible motive.

"He pointed to us and he said, 'You ruined my life and now I'm going to ruin yours,'" said Alfrancis de Vera, a student at Sparks Middle School.

Classes are canceled for the rest of this week at Sparks Middle School, reports CBS affiliate KTVN in Reno. Neighboring Agnes Risley Elementary canceled classes for today as well; classes will resume Wednesday.

A candlelight vigil is scheduled for Wednesday at 7 p.m. in front of Sparks Middle School. The Patriot Guard and various veteran groups will participate in an honor guard.

The Sparks Nazarene Church will hold a community prayer on Thursday at 6:30 p.m.

The Community Foundation of Western Nevada has set up a fund to help victims' families. You can donate to the "Compassion Fund" at 775-333-5499 or go to Police warned the community to be aware of possible scams, and urged people to use the Nevada Fund link.