Robert Mondragon, a self-proclaimed body modification “mechanic,” posted pictures of his blood soaked face, clothing and a book on Facebook early last year. On Friday, the Broward Sheriffs Office (BSO) announced Mondragon was arrested for leaving dead animals at Marjory Stoneman Douglas High School in Coral Springs. Officials say Mondragon was obsessed with mass school shootings and murder.

In late 2020, Mondragon abandoned his traditional Facebook profile when he started a new profile under the pseudonym “Mors Mortem.” Mondragon’s last post as “Mors Mortem” was made in late July 2022.

His profile was filled with disturbing imagery. Mondragon often posted information about suicide, autism and the Twisted Metal video game.

On January 26, 2022, Mondragon posted a selfie with the caption, “Dying on the inside, surviving on the outside.“ Mondragon is wearing a Henry D. Perry Education Center lanyard around his neck. It is unclear if the photograph was taken inside the school.

On February 5, 2021, a disturbing selfie shows Mondragon’s face and tshirt covered in blood. Another photograph posted that day shows pages of Bret Easton Ellis’ American Psycho novel smeared with blood.