Two of the victims died at the hospital.
Israel explained that 12 individuals were killed inside of the building, two just outside of the school, and one on a nearby street.
Sheriff Israel, whose own triplets graduated from the high school, said what happened makes him sick to his stomach.
"This is a really good school, and now it's like a war zone", Mr Obin said.
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A father said Cruz pulled a fire alarm at the school and that caused students and teachers to come out of their classroom so he could start shooting in the hallway. He said investigators scoured social media sites the shooter may have visited and that some unverified images pictured a man purporting to be Cruz brandishing guns and knives.
Officials are examining Cruz's digital profile, which contained what Israel described as "very, very disturbing" content. "The question is once you get into the investigation: How did the shooter obtain the weapon?"
This is what we know so far about a shooting at a high school in Florida which has left multiple people dead.
The White House said President Trump has been briefed on the shooting and is monitoring the situation.
Mark Klein was waiting to pick up his son Manny, a ninth-grader who was able to call him during the lockdown at the school to say he was OK.
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Broward County School District Superintendent Robert Runcie told reporters on Wednesday afternoon that he did not know of any threats posed by Cruz to the school.
Stoneman Douglas High School had an enrollment of about 3,100 students in the 2015-16 year, according to the National Center for Education Statistics.
"It was supposed to be just a fire drill, we thought it was just a fire drill because we had one earlier".
After the shooting, Cruz reportedly tried to escape by blending in with other fleeing students, law enforcement sources and eyewitnesses said to ABC News.
This is a breaking news story and will be updated with additional information as it becomes available.
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