The shooting suspect in Friday's Texas high school massacre wore a black trench coat and a t-shirt that read "Born to Kill" as he fired on students, teachers and police officers.
The 17-year-old student, identified by the Associated Press and several other media outlets as Dimitrios Pagourtzis, was concealing a shotgun and a .38 revolver under the long coat. He had worn the coat to school every day for some time.
Hours after 10 people — nine students and one teacher — were killed and 10 others were wounded, details are emerging about the suspect.
Texas Gov. Greg Abbott said during a news conference that the two guns used belonged to the suspect's father, and that it was not clear if the father knew his son had taken them.
Officials also revealed that the suspect had been spending time in an empty trailer on the family's property, which may have been where he assembled the explosive devices that he allegedly brought to the school.
According to the Houston Chronicle, a police official told two neighbors that the abandoned trailer was being used as a "stash house" to keep pipe bombs and Molotov cocktails.
The same neighbor told the Chronicle that an armada of police officers arrived at the scene to investigate the trailer around 8 a.m. local time Friday. The shooting occurred around 7:40 a.m.
According to Houston ABC affiliate KTRK, Pagourtzis had posted several images on his Facebook page, which has since been taken down, of the trench coat adorned with various pins that reportedly represented Nazis and communism, the aforementioned t-shirt, and weapons.
In 2016, Pagourtzis played on his school's junior varsity football team and was credited in a game recap posted to the squad's website as playing a "huge role" in helping stop the other team's running game from his position as defensive tackle.
Pagourtzis was a member of the class of 2019.
After his arrest, police discovered journal entries on his cell phone and computer that talked about carrying out the mass shooting and committing suicide when it was over.
"As you probably know, he gave himself up," Abbott said. "He admitted that he didn't have the courage to commit suicide."