1/31A video monitor shows school shooting suspect Nikolas Cruz (C) making an appearance before Judge Kim Theresa Mollica in Broward County Court, Thursday, Feb. 15, 2018, in Fort Lauderdale, Fla.
3/31Students are evacuated from Marjory Stoneman Douglas High School during a shooting incident in Parkland, Feb. 14, 2018 in a still image from video.
4/31The flag above the White House in Washington is lowered to half-staff for the victims of a mass shooting in a South Florida High School, Feb. 15, 2018.
5/31This video screen grab image shows shooting suspect Nikolas Cruz at Broward County Jail in Ft. Lauderdale, Florida, Feb. 15, 2018. The heavily armed teenager who gunned down students and adults at a Florida high school was charged with 17 counts of premeditated murder, court documents showed.
6/31Attendees raise their candles at a candlelight vigil for the victims of the shooting at Marjory Stoneman Douglas High School, in Parkland, Fla., Feb. 15, 2018.
8/31Police vehicles block the road to Marjory Stoneman Douglas High School in Parkland, following a shooting that killed 17 people in Parkland, Florida, Feb. 14, 2018. A former student armed with an AR-15 rifle opened fire at the high school, killing at least 17 people, officials said.
9/31A man who was placed in handcuffs by police is loaded into a paramedic vehicle after a shooting incident at Marjory Stoneman Douglas High School in Parkland, Feb. 14, 2018 in a still image from video.
10/31Dr. Igor Nichiporenko, Medical Director Trauma, left, and Dr. Evan Boyer, Medical Director, Emergency Services, speak about treating victims and the suspect at a press conference outside Broward Health North hospital, Feb. 14, 2018, in Deerfield Beach.
11/31Anxious family members wait for news of students in Parkland, Florida, Feb. 14, 2018. A shooting at Marjory Stoneman Douglas High School sent students rushing into the streets as SWAT team members swarmed in and locked down the building.
12/31A man placed in handcuffs is led by police near Marjory Stoneman Douglas High School following a shooting incident in Parkland, Feb. 14, 2018 in a still image from video.
13/31Florida Gov. Rick Scott speaks during a news conference near Marjory Stoneman Douglas High School in Parkland, where a former student is suspected of killing at least 17 people, Feb. 14, 2018.
15/31A law enforcement officer tells anxious family members to move back, Feb. 14, 2018, in Parkland, Florida. Police warned that the shooter was still at large even as ambulances converged on the scene and emergency workers appeared to be treating those possibly wounded.
16/31Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami, Feb. 14, 2018.
17/31Police escort Nikolas Cruz into Broward County Jail following a shooting incident at Marjory Stoneman Douglas High School, in Fort Lauderdale, Florida, Feb. 15, 2018 in a still image from video.
18/31Le président américain Donald Trump parle de la fusillade en Floride, dans la salle de réception diplomatique de la Maison-Blanche à Washington, DC, le 15 février 2018.
21/31Police patrol the area outside Marjory Stoneman Douglas High School following a school shooting incident in Parkland, Florida, U.S., February 15, 2018.
25/31Bob Ossler, chaplain with the Cape Coral volunteer fire department, places 17 crosses for the victims of Wednesday's shooting at Marjory Stoneman Douglas High School on a fence a short distance from the school in Parkland, Florida, Feb. 15, 2018.
27/31Tyra Hemans, a 19-year-old senior at Marjory Stoneman Douglas High School, sobs as she holds signs honoring slain teachers and friends near the police cordon around the school in Parkland Florida, Feb. 15, 2018.
31/31Students grieve outside Pines Trail Center where counselors are present, after Wednesday's mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, Feb. 15, 2018.