Fred Guttenberg, whose daughter was killed during a 2018 school shooting, was removed from House chamber on Tuesday night after yelling at President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE during the State of the Union.

An individual could be heard screaming at Trump from the gallery above the chamber as the president spoke about Second Amendment rights, before being quickly removed by Capitol Police.

The protestor, according to multiple reports, was Guttenberg, whose daughter, Jaime Guttenberg, was killed in the Stoneman Douglas High School shooting in Parkland, Fla., in 2018.

Fred Guttenberg, a gun violence activist who lost his daughter in the Parkland, Fla. school shooting in 2018, was escorted out of the #SOTU by police after loudly shouting something at the president during his address. — USA TODAY Politics (@usatodayDC) February 5, 2020

UPDATE - this was Fred Guttenberg, the father of Jaime Guttenberg, who was killed in the Parkland shooting https://t.co/iRR88gWzQq — Kasie Hunt (@kasie) February 5, 2020

Guttenberg's comments were partially drowned out by GOP lawmakers who were applauding Trump's line. But some reporters in the gallery characterized him as speaking about "victims of gun violence."

A man shouts from the gallery about "victims of gun violence like my daughter."



He shouted it while Republicans were applauding, so most people didn't really hear it, but Capitol Police have removed the man from the chamber. — Matt Fuller (@MEPFuller) February 5, 2020

Guttenberg was at the State of the Union as a guest of House Speaker Nancy Pelosi Nancy PelosiPowell warns failure to reach COVID-19 deal could 'scar and damage' economy Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.).

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His actions quickly got support from other gun control groups and activists, who publicly backed Guttenberg on social media.

Guttenberg has been a vocal advocate for gun control since the shooting, and has called out a number of Republican lawmakers for their record on guns.

Guttenberg previously grabbed headlines in late 2018 after he tried to shake then-Supreme Court nominee Brett Kavanaugh Brett Michael KavanaughGideon leads Collins by 12 points in Maine Senate race: poll Conservatives see glaring omission on Trump's Supreme Court shortlist Cruz says he wouldn't accept Supreme Court nomination MORE's hand during a hearing on his Supreme Court nomination.

Kavanaugh, who came under scrutiny for his views on gun rights, did not shake his hand.