Florida law enforcement officials identified the suspected gunman in the shooting at Marjory Stoneman Douglas High School as Nicolas Cruz.

The suspect's full-name, Nicolas de Jesus Cruz, was identified by the Miami Herald, which interviewed a former math teacher about the suspect.

“We were told last year that he wasn’t allowed on campus with a backpack on him,” math teacher Jim Gard told the Herald, noting that the suspect had been in his class last year. “There were problems with him last year threatening students, and I guess he was asked to leave campus.”

The Daily Mail reports:

The teenager had been expelled from the school for unknown 'disciplinary reasons'. Authorities have already started dissecting his social media accounts and reported that some of things he had been posting was 'very disturbing'.

Fox News reports that Cruz was a member of "resistance groups" on Facebook, according to reporter Trace Gallagher.

“He’s also following resistance groups, like Syrian Resistance groups and fighter groups out of Iraq and, we should also note that a couple days ago, as far as a week ago, that he was involved in a Youtube chat room conversation about bombs or building bombs,” Gallagher said.

WATCH:

A student that attends the high school said that "everyone predicted" that the suspect would shoot up a school.