(MCT) The FBI was alerted last fall about a person named Nikolas Cruz who vowed online to become “a professional school shooter.”

The name was the same as the 19-year-old accused of killing 17 people in a rampage Wednesday at Marjory Stoneman Douglas High School in Parkland.

FBI special agent in charge Robert Lasky said the agency was alerted in September about a comment on a YouTube channel. A YouTube user, Ben Bennight, told CNN that he called the FBI, but nothing came of it.

Lasky said there was no information that would “indicate a particular time, location, or the true identity of the person who posted the comment. The FBI conducted database reviews and other checks, but was unable to further identify the person who posted the comment.”

Bennight, a 36-year-old video blogger from D’Iberville, Mississippi, told CNN that when he saw news of the shooting Wednesday at Marjory Stoneman Douglas High School and saw Cruz’s name, he remembered what he’d seen on his YouTube page.
Bennight told CNN that he thought, ‘Wow, I hope you were at least watching this guy that I alerted you to months ago.”

As reports of red flags surrounding Cruz surface, President Donald Trump tweeted about it early Thursday, saying: “So many signs that the Florida shooter was mentally disturbed, even expelled from school for bad and erratic behavior.

Neighbors and classmates knew he was a big problem. Must always report such instances to authorities, again and again!”