Violence

Emma Rothenberg, left to right, with her mother Cheryl Rothenberg and sister, Marjory Stoneman Douglas High School student Sophia Rothenberg embrace at a memorial marking the one-year anniversary of a mass shooting at the school in Parkland, Fla., on Thursday, Feb. 14, 2019. (Al Diaz/Miami Herald via AP)

Suzanne Devine Clark, an art teacher at Deerfield Beach Elementary School, places painted stones at a memorial outside Marjory Stoneman Douglas High School during the one-year anniversary of the school shooting, Thursday, Feb. 14, 2019, in Parkland, Fla. A year ago on Thursday, 14 students and three staff members were killed when a gunman opened fire at the high school. (AP Photo/Wilfredo Lee)

In this Jan. 30, 2019, photo, Sgt. Michael Hazellief, training supervisor, walks on the grounds where the "guardians" are participating in a training session to respond to active shooters in Okeechobee, Fla. Okeechobee is one of the Florida districts that have started training and arming non-instructional personnel in the aftermath of the Marjory Stoneman Douglas High School shooting. Authorities keep the identities of these guardians secret, citing security reasons. (AP Photo/Brynn Anderson)

Suzanne Devine Clark, an art teacher at Deerfield Beach Elementary School, places painted stones at a memorial outside Marjory Stoneman Douglas High School during the one-year anniversary of the school shooting, Thursday, Feb. 14, 2019, in Parkland, Fla. A year ago on Thursday, 14 students and three staff members were killed when a gunman opened fire at the high school. (AP Photo/Wilfredo Lee)

Suzanne Devine Clark, an art teacher at Deerfield Beach Elementary School, places painted stones at a memorial outside Marjory Stoneman Douglas High School during the one-year anniversary of the school shooting, Thursday, Feb. 14, 2019, in Parkland, Fla. A year ago on Thursday, 14 students and three staff members were killed when a gunman opened fire at the high school. (AP Photo/Wilfredo Lee)

FILE - In this Jan. 18, 2019 file photo, former Chicago police Officer Jason Van Dyke attends his sentencing hearing at the Leighton Criminal Court Building in Chicago, for the 2014 shooting of Laquan McDonald. The wife of the white Chicago police officer who fatally shot the black teenager McDonald said on Wednesday, Feb. 13, 2019, that her husband has been assaulted by inmates in his cell at a Connecticut prison. The Chicago Sun-Times reports that Tiffany Van Dyke says Jason Van Dyke had been placed in the prison's general population before being assaulted. (Antonio Perez/Chicago Tribune via AP, Pool, File)

Suzanne Devine Clark, an art teacher at Deerfield Beach Elementary School, places painted stones at a memorial outside Marjory Stoneman Douglas High School during the one-year anniversary of the school shooting, Thursday, Feb. 14, 2019, in Parkland, Fla. A year ago on Thursday, 14 students and three staff members were killed when a gunman opened fire at the high school. (AP Photo/Wilfredo Lee)

Ilan and Lori Alhadeff, center, the parents of Alyssa Alhadeff, who was killed in the Parkland, Fla., school shooting, hold hands as they listen to Florida governor Ron DeSantis as he speaks during a news conference, Wednesday, Feb. 13, 2019, in Fort Lauderdale, Fla. DeSantis ordered a statewide grand jury investigation on school safety. At left is Florida Attorney General Ashley Moody. (AP Photo/Wilfredo Lee)

Volunteers help build a California artist, David Best's vision for a non-denominational, temporary temple for the anniversary of the Marjory Stoneman Douglas High School shooting massacre, on Tuesday, Feb. 5, 2019 in Coral Springs, Fla. The temple will remain open until May when it will be burned in a purification ceremony. (AP Photo/Brynn Anderson)