(CNSNews.com) - Amid the predictable calls for stricter gun control on Thursday and the predictable demonization of the gun lobby, some people, including the president, are talking about signs of impending trouble that were missed:
Trump tweeted early Thursday: "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!"
The 19-year-old gunman shot and killed at least 17 people at Marjory Stoneman Douglas High School in Parkland, Fla. shortly before school ended on Wednesday. Another 15 people were injured, some critically.
He was later arrested and will appear in court today.
The school had expelled him last year for behavior issues.
Before his expulsion, the gunman reportedly was barred from bringing a backpack to school for security reasons.
The young man bought his AR-15 legally, but his social media account contained posts described by Broward County Sheriff Scott Israel as “very, very disturbing.” Some of the gunman's classmates were aware of, and disgusted by, those posts.
According to The Telegraph: "One student, who escaped the shooting, wrote on Twitter: 'He literally had an Instagram where he posted pictures of animals he killed gruesomely.'"
According to the Daily Mail, another student who lived next door to Cruz for six months "described him as a violent loner who stole from neighbors and hurled coconuts at their homes."
Other press accounts said some students joked that if there were a school shooting, this person would be the one to do it.
Broward County Mayor Beam Furr told CNN that the young man was treated at a mental health clinic for a while, but he hadn't been back to the clinic for over a year. Apparently he had not been adjudicated mentally ill, which would have barred his gun purchase.
And according to BuzzFeed, the gunman left a comment on a video in September, stating: "I'm going to be a professional school shooter." The video's creator alerted both the FBI and YouTube, and the FBI reportedly followed up with the videographer.
The shooter and his brother were adopted by a Long Island couple who later moved to Florida and who are now dead. The adoptive mother reportedly died of complications from flu just a few months ago, in November. The adoptive father died years ago. Friends of the family agreed to take in the young man.
An attorney representing the family friend said they did not see this coming. They allowed the young man to keep his gun locked up in his room.
President Trump offered "prayers and condolences" on Wednesday afternoon following "the terrible Florida shooting. No child, teacher or anyone else should ever feel unsafe in an American school," he wrote.