School violence

California Gov. Gavin Newsom, seated hands Assemblyman Phil Ting, D-San Francisco, second from right, a copy of his bill that Newsom signed at the Capitol in Sacramento, Calif., Friday, Oct. 11, 2019. The law allows employers, co-workers and teachers to seek gun violence restraining orders for people they believe to be a danger to themselves or others. Ting's measure was one of more than a dozen gun control bills the governor signed Friday. (AP Photo/Rich Pedroncelli)

Police attend the scene of a violent incident at the Hermanni shopping centre in Kuopio, Finland, Tuesday Oct. 1, 2019. Finnish police say that one man has died in a knife attack and several others are injured at the shopping center in central Finland. (Hannu Rainamo/Lehtikuva via AP)

This Wednesday, Sept. 18, 2019 photo provided by the Pinellas County Sheriff's Office shows Daniel McMahon, 31, of Brandon, Fla. A Justice Department spokeswoman said McMahon was indicted in Virginia on charged that include bias-motivated interference with a candidate for elective office. (Pinellas County Sheriff's Office via AP)

FILE - This undated file photo released by the Long Beach, Calif., Police Department shows weapons and ammunition seized from a cook at a Los Angeles-area hotel who allegedly threatened a mass shooting. Rodolfo Montoya was arrested Tuesday, Aug. 20, a day after allegedly telling a co-worker at the Long Beach Marriott he planned to shoot fellow workers and others. Experts say media coverage of the shootings makes the public more prone to inform on worrisome relatives or neighbors in an attempt to thwart more shootings. Following the high-profile shootings in California and Texas and Ohio, tips to the FBI rose by about 15,000 each week. (Long Beach Police Department via AP, File)

FILE - This April 30, 2019, file booking photo provided by Mecklenburg County Sheriff's Office shows Trystan Andrew Terrell. The Mecklenburg County District Attorney’s office says Trystan Andrew Terrell will appear for an arraignment on Thursday, Sept. 19, 2019 at around 2 p.m. (Mecklenburg County Sheriff's Office via AP, File)

FILE - In this July 16, 2019, file photo, Education Secretary Betsy DeVos listens during a Cabinet meeting in the Cabinet Room of the White House in Washington. The Trump administration is threatening to cut grant funding to a Middle East studies program at the University of North Carolina and Duke University, saying it’s misusing federal funding to advance “ideological priorities” and unfairly promotes “the positive aspects of Islam” but not Christianity or Judaism. (AP Photo/Alex Brandon, File)

In this Aug. 22, 2019 photo, Jessica Moloney, holding her 6-month-old daughter Amelia, expresses her displeasure at a meeting at Highland High School in Marengo, Ohio, about how the school board handled a recent incident where a child had access to a gun, pointed it at another student, and that parents weren't informed. Schools across the country have faced a backlash for favoring privacy over telling parents when there are threats in their children’s classrooms. Safety experts advise schools to tell parents as much as they can as soon as they can about threats. (Fred Squillante/The Columbus Dispatch via AP)

FILE - In this March 24, 2018, file photo, thousands of people gather on the grounds of the Texas State Capitol during a "March for Our Lives" rally in Austin, Texas. The vast majority of mass shooters have acquired their firearms legally with nothing in their background that would have prohibited them from possessing a gun. But there have been examples of lapses in the background check system that allowed guns to end up in the wrong hands. Very few states also have a mechanism to seize firearms from someone who is not legally allowed to possess one.(Nick Wagner/Austin American-Statesman via AP, File)