Glenn breaks down the Parkland shooting timeline: 'This was a massive failure of the system

Red flags which warned authorities of the Parkland school shooter's dangerous and disturbing behavior were waving in the faces of local and federal law enforcement officials and government agencies for at least two years before he gunned down 17 people at Marjory Stoneman Douglas High School on Valentine's Day.

On the show today, Glenn took to the chalk board to break down the timeline of the missed warning signs over the past two years:

February 5, 2016 - The Broward County Sheriff's Office received an anonymous call reporting that the shooter had threatened on Instagram to shoot up the school. He also posted picture of himself with guns and knives. The information was forwarded to the school deputy who didn't follow up.

September 23, 2016 - A counselor reported to the Broward County Sheriff's Office that the shooter had possibly attempted suicide attempt, was cutting himself, and had expressed interest in buying a gun. It was reported to his school who said they would conduct an assessment.

September 28, 2016 - Florida Department of Children and Families, who had formerly been alerted to posts on Snapchat of the shooter cutting his arms and saying he wanted to buy a gun, were called to the Cruz home to investigate a disturbance. They ruled that he was "at low risk of harming himself or others."

September 24, 2017 - A YouTube user sent a tip to the FBI, via tips@fbi.gov, reporting that a commenter named “nikolas cruz,” wrote “Im going to be a professional school shooter” on his YouTube channel. The FBI responded that they could not "positively identify" the person who posted this comment.

November 1, 2017 - A family member called the Broward County Sheriff's Office to report that the shooter had weapons and asked the police to come take them. The weapons were not collected by police.

November 30, 2017 - A caller from Massachusetts calls the Broward County Sheriff's Office to report that the shooter was collecting guns and knives and could be a “school shooter in the making.” No report was filed.

January 5, 2018 - Call to FBI tip line, a person close to the shooter reported that "has a desire to kill people" and could "conduct a school shooting." This tip was never passed on the local Florida FBI office.

"The warning signs were all over this shooter," said Glenn. "This was a massive failure of the system, again. There were 18 calls made to law enforcement, 39 home visits and 2 FBI tips by name. Nothing was ever done.

Watch the video clip above to hear Glenn's take.

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