Cruz was expelled from the high school for unspecified disciplinary reasons, said officials, who provided different spellings of Cruz’s first name throughout the day.
Officials are examining Cruz’s digital profile, which contained what Israel described as “very, very disturbing” content.
Arrested without incident
Cruz was taken into custody without incident in nearby Coral Springs after the shootings, according to Israel.
The suspect has been talking to investigators, according to a law enforcement source.
Police said Cruz was armed with multiple magazines and at least one AR-15 style rifle.
Law enforcement sources told CNN the Bureau of Alcohol, Tobacco, Firearms and Explosives is tracing the.223 caliber, AR-15 style firearm used in the shootings.
Suspect sought higher death toll
Investigators believe the suspect pulled the school’s fire alarm to draw people out and get a higher death toll, according to a law enforcement source.
“But then word started going around that it was shots and not just, like, something else, everyone just started running towards the canal,” the student said.