As they try to understand what prompted a 12-year-old boy to open fire at his school, district officials were examining an anti-bullying video that includes a dramatization of a child taking a gun on a school bus to scare aggressors.
The video, which uses the scene as an illustration of the wrong way to respond, was being studied as students and faculty members prepared to return to Sparks Middle School, where a boy fatally shot a math teacher, 45-year-old Michael Landsberry, wounded two classmates and killed himself Monday.
Sparks city spokesman Adam R. Mayberry identified the shooter Thursday as Jose Reyes.
Washoe County School District spokeswoman Victoria Campbell said school officials were examining the video but couldn't comment because it's part of the broader investigation into the shooting just outside the school building about 5 miles (8 kilometers) northeast of downtown Reno.
It wasn't clear if the video had been seen by the young shooter, whom police previously refused to identify.
It was the second incident this week in which a student allegedly killed a mathematics teacher in the United States.
In Danvers, Massachusetts, a teacher who was allegedly killed by one of her students had asked him to stay after school the day she died, a classmate said.
Philip Chism, 14, was charged with murder Wednesday in the death of Colleen Ritzer, a 24-year-old math teacher at Danvers High School.
Rania Rhaddaoui sat two seats away from Chism in Ritzer's Algebra I class, the final class of the school day. She said Chism was drawing in a notebook rather than taking notes Tuesday.
"She came over and said, 'I didn't know you draw,' and he said, 'yes,' then later on, she said, 'Can you stay after with me?'" Rhaddaoui said. "Obviously, he stayed after because when I was leaving, he was still at his desk."
She said she was unsure why exactly Ritzer asked Chism to stay after school.
Ritzer never returned home that day. Blood in a second-floor bathroom helped lead investigators to her body, which was dumped in the woods behind the school in a close-knit community about 20 miles (30 kilometers) north of Boston.
Authorities offered no clues Thursday on Chism's alleged motive. They also would not say how Ritzer was killed.