Cano's former girlfriend Nicolette French told ABC News that she remembers Cano recently referencing Columbine. Now she wishes that he had been more direct when talking about it.
"I would have helped him get through it instead of him sitting there and actually wanting to harm other people and harm himself," French said.
The arrest on Tuesday came just hours after an anonymous tipster alerted police about Cano's alleged plot. After the tip came into Tampa Police Department's call center that Cano was plotting to bomb the school, detectives immediately called a bomb squad to his apartment.
Principal Farkas said in a press conference that he did know Cano, and that "there are threats that happen" involving the school, but that "95 percent of time, they're not real." He admitted to not realizing that Cano posed any real threat.
"Being in this business long enough, it's hard to say that you don't … you can almost expect anything," he said. "It's hard to have surprises nowadays. But the reality is ... No I didn't pick that kid up."