From the article:
A fellow Temecula Valley High School student saw him showing off the gun at the Rancho Vista Road campus and alerted staff shortly before noon, said Lt. Mark Bostrom of the Riverside County Sheriff’s Department.
A school resource officer and campus supervisor quickly found the 10th-grader and the gun, Principal Richard Lawrence wrote in a letter emailed to parents this afternoon. The boy was detained and no one was injured, school officials said.
The gun was not loaded, but the student had two bullets with him, Lawrence said.
“It appears the student brought the gun to school to intimidate another student who he got into an argument with, over a girl, earlier in the week,” Lawrence wrote.
Melanie Norton, spokeswoman for the Temecula Valley Unified School District, said the incident did not disrupt classes. It appears that only a small number of students saw the gun, she said. The 15-year-old was showing it to them, not threatening them with it, she said.
“He made an extremely poor decision,” Norton said. “It’s just very shocking. This isn’t something you would think would happen in Temecula.”Every gun in the hands of a child must first pass through the hands of an adult.