David Katz

His pseudonyms included "Bread", "mrslicedbread", "RavensChamp", "ravens2012champ" and "TREXHAVAHARTATAK".

He had previously won $10,000 in a 2017 Madden Tournament.

Katz had a history of mental illness and was prescribed anti-psychotic medication.

He was diagnosed with dysthymia and oppositional disorder not otherwise specified and had been involuntarily committed to mental hospitals on numerous occasions.

The Jacksonville Sheriff's Office used Twitter to announce that there were fatalities at the scene at 2:45 p.m. EDT, and that one suspect was dead at the scene at 2:53 p.m. EDT.

Initially, it was unknown whether there were additional gunmen, but later, officials confirmed that there was only one suspect in the shooting.

He was armed with a .45 caliber handgun and a 9mm handgun, with the Sheriffs Office stating that one of the weapons was equipped with an aftermarket laser sight attached to the trigger guard.

The weapons had been stored in his vehicle, and purchased legally in Baltimore, Maryland.

The Sheriff's Office issued an update at 7:37 p.m. EDT, indicating that the FBI were involved in the investigation, and that there was coordination with officers in the suspect's hometown of Baltimore.

Police and federal agents visited a house in South Baltimore, which was identified as Katz's father's home.

They added that updates would be posted on their Twitter accounts.

Electronic Arts, which published Madden NFL 19 and had approved the competition, cooperated with the investigations.

The Sheriff's Office reported that the incident is being investigated as a criminal act and not as an act of terrorism.

The Jacksonville Landing shooting, also known as the Jacksonville shooting, was a mass shooting that occurred at a video game tournament for the video game Madden NFL 19 in Jacksonville Landing, Jacksonville, Florida, on August 26, 2018, at about 1:30 pm (EDT).

A lone gunman, David Katz, shot and killed two people and injured another ten before killing himself.

The GLHF (Good Luck Have Fun) Game Bar, a video game venue in the Jacksonville Landing indoor marketplace, hosted a Madden NFL 19 video gaming tournament on August 26, 2018, with around 130 to 150 participants and onlookers.

After one of the participants, David Katz, lost a game, he refused to shake the hand of the winner and left the tournament.

Soon after, he returned with one of the two handguns he had brought to the event.

Katz fired 12 shots, killing two people and wounding ten others, then committed suicide.

One more sustained injuries while fleeing.

A tournament announcer said that he had been interviewing the first victim before he was fatally shot, and that he had been intentionally targeted.

The gunman then turned and began shooting indiscriminately.

Gunfire was first reported on social media at 1:34 pm EDT by tournament participants.

The event's Twitch stream recorded footage of the shooting, which was later uploaded to YouTube.

The Jacksonville Sheriff's Office urged individuals to stay away from the location at 2:13 p.m. EDT, and SWAT officers evacuated and searched the area.

First responders arrived on the scene within two minutes of the first 911 call, and arrived at 1:36 pm EDT.

The president of the firefighters union told reporters that it was training in the area when victims had run up to staff for help.

Due to the location being next to the St. Johns River, the Coast Guard was called in to sweep the surrounding waterways.

Eleven people were taken to hospitals for treatment of their injuries.

Some of the injured had been able to leave the bar and sought assistance from first responders.

Two others had driven themselves to the hospital.

Of those injured, ten individuals received gunshot wounds and one person was injured attempting to flee from the location.

The day after the incident Memorial Hospital released a statement that one individual had minor injuries, and three were in good condition, and UF Health announced that four victims had been released, with two still admitted.

The shooter, David Katz, was a 24-year-old professional Madden player from Baltimore, Maryland, who had been attending the Jacksonville tournament as a participant.

Katz had lost a few rounds in the competition, which prevented him from reaching the finals.

Fellow competitors reported that he had been "acting weird" and refused to shake hands with them after losing the competition.

As of August 30, 2018, at least one participant had filed a lawsuit against the tournament sponsor Electronic Arts, the game manufacturer, the mall, and the restaurant where the incident occurred.

The lawsuit claims "to hold those responsible accountable, and to ensure that gamers ... are able to get together to pursue their passion without having to fear for their lives".

Participants and sponsors of participants took to social media to express safety, injuries, and recollections of the incident.

Electronic Arts (EA) released a statement saying its "most heartfelt sympathies" went out to the families of the victims and those who were injured and that its focus was on those affected and aiding law enforcement.