Washington (CNN) The father of a Parkland shooting victim who had a heated exchange with Rep. Matt Gaetz at a gun prevention hearing said Thursday he decided to interrupt the Florida Republican to "let the nation know he's wrong."

On Wednesday, during the House's first hearing in years on gun violence prevention, Manuel Oliver interrupted Gaetz, a vocal Hill ally of President Donald Trump, when the congressman began arguing that illegal immigration, not firearms, poses a greater threat to national security and thus requires a wall along the US-Mexico border.

"My first feeling is that this guy's in the wrong room. He should be discussing this matter in another place," Oliver told CNN's Poppy Harlow Thursday on "New Day." "Don't bring the wall as a solution for everything."

Oliver lost his 17-year-old son Joaquin in the February 14, 2018, shooting at Marjory Stoneman Douglas High School in Parkland, Florida. He told CNN that he found Gaetz's comments "pretty offensive."

"No. 1, I don't think you're qualified for this. No. 2, you're asking us to waste time. You are wasting time from us really to go ahead and solve the problem," he said. "If this is how this is going to work, I have to stop this guy. I have to let the nation know he's wrong."

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