Although the boy claimed his comment was a joke and investigators did not uncover a specific plot, Los Angeles County Sheriff, Jim McDonnell said it showed the need to take every potential threat seriously.
In the El Camino case, McDonnell said a security guard overheard the student say he was going to shoot up the school sometime in the next three weeks and that a semi-automatic weapon was registered to the student's home address.
The threat came just two days after a former student opened fire and killed 17 students and faculty at a Florida high school.
Since last week's school shooting in Parkland, Fla., the number of threats of violence against schools across the country has increased.
"It comes down to public safety, and safety for your fellow students and your family, and understanding their observations are meaningful and that law enforcement is going to pay attention to that and not overlook it", Torrance police Sgt. Ronald Harris said.
The teen's older brother, a 28-year-old Army veteran, told investigators that the firearms were his, and had been legally purchased in Texas and sent back to California, the sheriff said.
Redlands police put extra resources, including high-visibility patrols, at a school campus any time a credible threat is identified, city spokesman Carl Baker said.
Inside the teen's home, authorities found four guns that would have been easily accessible, according to one of the arresting deputies, Martin Maciel. The teenager was arrested on suspicion of making criminal threats.
Such threats are not new, police say, and whether the actual number has increased in Southern California since the February 14 tragedy at Marjory Stoneman Douglas High is debatable, experts say.
"Thanks to the actions of school safety officer [Marino] Chavez and Sheriff's Deputies Scott Reynal and Martin Maciel, a potentially deadly and devastating attack on our children was avoided", the statement read. One was registered to the man and another was unregistered, which is a felony in the state, McDonnell added.
"No, I'm not a hero, just doing my job", he said.
The weapons "were readily available to him", the sheriff said of the younger suspect. Chavez said he immediately confronted the teen, who confirmed the threat, but then backtracked. The mother reported her son, saying she did not know what he was capable of, the sheriff said. On Feb. 15, a student who had been suspended told his mother he wanted a school administrator dead, the sheriff said. The student allegedly continued to make threats, telling Chavez that he would carry out the shooting in three weeks, according to Jacobsen.
Ohio River likely to stay above flood stage for days — TIMELINE
By comparison, the historic 1937 flood, which prompted the creation of Huntington's floodwall, crested at a record 69.45 feet. We are finally looking at a few dry days Sunday and early next week, which may give the river the break it needs to recede.
Gregg Popovich says he'd be surprised if Kawhi Leonard returns this season
Buford spoke to Jabari Young of the San Antonio Express-News about what the Spurs were missing with Gay's absence on the court. However, it's doubtful they'll be capable of making any kind of run in the playoffs without their best player.
Apple considering buying cobalt directly amid booming demand
Over the past eighteen months, the price of cobalt has tripled to more than $80,000 a metric ton. Cobalt is a metal that is used in the making of batteries for all types of devices.