Sign up for our daily briefing
Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.
Catch up on coronavirus stories and special reports, curated by Mike Allen everyday
Catch up on coronavirus stories and special reports, curated by Mike Allen everyday
Denver news in your inbox
Catch up on the most important stories affecting your hometown with Axios Denver
Des Moines news in your inbox
Catch up on the most important stories affecting your hometown with Axios Des Moines
Minneapolis-St. Paul news in your inbox
Catch up on the most important stories affecting your hometown with Axios Twin Cities
Tampa Bay news in your inbox
Catch up on the most important stories affecting your hometown with Axios Tampa Bay
Charlotte news in your inbox
Catch up on the most important stories affecting your hometown with Axios Charlotte
Photo by Carlos Miller/Anadolu Agency/Getty Images
YouTube vlogger Ben Bennight contacted the FBI in September after a user named Nikolas Cruz commented, "I'm going to be a professional school shooter," on one of his videos, according to BuzzFeed News. The FBI interviewed Bennight the following day to ask if he knew anything about Cruz, and contacted him again Wednesday after the 19-year old allegedly killed at least 17 people at Marjory Stoneman Douglas High School in Parkland, Fla.
Why it matters: Details about Cruz's background and disturbing social media presence continue to emerge, painting a picture of a troubled teenager who struggled with mental health and disciplinary problems.