Austin Metcalf’s bereft mother struggled to gain composure as her remaining son recalled the horror of watching his identical twin’s “soul leave” his body while he held him in his arms after he was fatally stabbed in the heart at a track meet in Texas.

The alleged killer, 17-year-old Karmelo Anthony, had “said some, like, aggressive stuff — like, reckless stuff — and Austin tried to handle the problem,” Austin’s twin, Hunter, recalled in an interview with Fox News’ Will Cain.

“I whipped my head around, and then all of a sudden I see him running down the bleachers just grabbing his chest … I put my hand on there, tried to make it [the bleeding] stop, and I grabbed his head and I looked in his eyes. I just saw his soul leave. And it took my soul, too,” Hunter said.

A fight erupted during a rain delay at Kuykendall Stadium in Frisco Wednesday morning after Anthony refused to move from the team’s pop up tent after he was asked by Austin to leave, according to an arrest report.

The spat escalated quickly when Anthony allegedly pulled a knife out of a backpack and stabbed Austin, 17, in the chest, killing him, according to police.

Anthony, who admitted to stabbing Austin but claimed he was defending himself, was arrested and charged with first degree murder.

“Seventeen years, my best friend, just there in the blink of an eye, I lost him. So I’m not at that point to forgive and forget, but eventually I will,” Hunter said on Fox.

Austin’s grieving mother, Meghan Metcalf, said she didn’t “really have words” to convey the loss of her son, who his parents remember as a dedicated student and highly recruited athlete.

“If I could say anything to the nation, I would say to make sure that you just hug your babies tight, because you don’t know when the last time you’ll get to do it,” she said through tears.