Authorities have said Cruz had a history of mental issues, numerous encounters with police and was expelled from Stoneman Douglas High School past year for disciplinary problems. Investigators and psychiatrists also have visited Cruz in his single-person cell in the jail's infirmary, where officers note his activities every 15 minutes.
All after school activities for U.S. Grant have been canceled for Thursday.
Law professor Ken Simons of the University of California, Irvine said school staff could be sued for their actions defending against a shooter if poor aim or a ricochet accidentally wounds or kills an innocent student.
On the recorded 911 call in which the unidentified mother can be overheard, the dispatcher advises the man who called what to tell the girl. "And there's a bill before us that is not flawless", she said.
One major school district has softened its original opposition to the protest.
"Hide somewhere, play dead", the mother can be heard telling her daughter in the background of the 911 call.
That massacre in Parkland - recently deemed Florida's safest community - clearly shows that an alienated, violent youth might turn up at any school or public place in the nation, determined to kill.
"I love you, I love you, it's going to be fine. You need to play dead".
"Is everyone ok?" a man asks a dispatcher, after his fiancee's little sister reportedly texted him to say there was someone shooting a gun. "Thank you so very much, sir". "I hope this turns out to be not as bad", the caller said.
"I'm glad however, the plan in this bill is not mandatory", Scott continued, adding that the program will be up to local officials to implement.
Andrew Pollack, whose daughter Meadow died, called the new law "a start for us". It's in response to last month's mass shooting at a Florida high school.
"I'm going to take the time and I'm going to read the bill and I'm going to talk to families", he said.
Peterson's attorney has said he did not enter the school because he believed the shooting was coming from outside the school buildings.
Scott, surrounded by families of the victims, recounted the grief visited on his state in the aftermath of the Valentine's Day carnage at Marjory Stoneman Douglas in Parkland and, in 2016, the shootings at Pulse nightclub in Orlando and Fort Lauderdale Airport.
Broward County Sheriff's Office also released audio of the radio transmission between officers as the shooting unfolds.
Mom: "He said he's in one of the math classes". Former student Nikolas Cruz is charged with 17 counts of first degree murder. He then reiterates, 38 seconds after his first call, "We're talking about the 1200 building". He appears to remain at this location during the entire event.
The bill creates the guardian program that would enable school employees and many teachers to carry guns if they go through law enforcement training and their school districts agree to participate. Ciaramello is also a leader in the school's Junior Reserve Officers' Training Corps. One officer who was at the football field, asks over the radio: "Does anybody have bolt cutters?" "Be advised we have possible, could be firecrackers, I think we have shots fired, possible shots fired", he tells dispatchers. "He's stuck in the fence, I need bolt cutters".