Suspect in Madden 19 tournament shooting targeted gamers: Sheriff originally appeared on abcnews.go.com

The suspect in a mass shooting that left two people dead and 12 with bullet wounds at a Madden 19 e-games tournament in Jacksonville, Florida, on Sunday, carried two handguns and extra ammunition into the contest venue and specifically targeted his competition, authorities said Monday.

The two people killed in the shooting allegedly committed by David Katz, 24, inside a back room bar at a Chicago Pizza restaurant in the Jacksonville Landing mall were considered the top two Madden gamers in the world, a competitor wounded in the rampage told ABC News.

PHOTO: David Katz seen here at a previous video game tournament (ABC News) More

"The suspect clearly targeted other gamers that were in a back room at the Chicago Pizza participating in this gaming tournament," Jacksonville Sheriff Mike Williams said of Katz at a news conference Monday afternoon. "The suspect walked passed patrons who were in other parts of the business and focused his attention on the gamers."

Meanwhile, court records obtained by ABC News in Baltimore from a divorce and child custody battle between Katz's parents show that Katz was treated in 2011 for mental health issues and that his mother informed the court that her son was suffering from depression and "affective disorders." Records also show that David Katz was once prescribed the antidepressants Risperdal and Fluoxetine.

PHOTO: David Katz seen here at a previous video game tournament (ABC News) More

Sheriff Williams said Katz was armed with two handguns, a .45-caliber and a 9mm, one with a laser scope, on Sunday, but investigators believe he only used one of the weapons in the attack.

"Video surveillance from inside the restaurant clearly shows that this is a single shooter incident and that the suspect took his own life after shooting the victims," Williams said.

He said Katz purchased both guns legally in Baltimore within the past month.

Killed in the shooting were Elijah Clayton, 22, of Woodland Hills, California, and Taylor Robertson, 28, a married father of a young boy from Giles, West Virginia. Another 12 people were wounded in the shooting and a 13th person was injured fleeing the gunfire, Williams said.

PHOTO: Police barricade a street near Jacksonville Landing in Jacksonville, Fla.,Aug. 26, 2018 (Laura Heald/AP) More

Clayton and Robertson were among the top players of the Madden NFL football e-game, according to EA Sports, publisher of the video game. Robertson -- nicknamed "SpotMePlzzz" -- was the defending champion of the Madden Classic, the Super Bowl for Madden gamers, held in Las Vegas.

"These two guys were two of the best Madden players in the world the last couple of years," Chris McFarland, a Madden gamer who was grazed in the head during Sunday shooting, told ABC News Monday from a Jacksonville hospital.

Williams said Katz's motive for the shooting remains under investigation.

In a video from a February 2017 interview Katz, who went by the nickname "Bread," gave to an EA Sports announcer during a Madden regional competition in Buffalo, New York, he seemed to carry a chip on his shoulder for being seeded seventh in the tournament that he ended up winning.

David Katz, right, has been identified by Jacksonville police as the suspected shooter at a Madden NFL esports tournament on Sunday, Aug. 26, 2018. Two people were killed and Katz committed suicide, police said. (Twitter/@buffalobills) More

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