Brother of Sicily Yacht Sinking Victim Still Thinks About the Passengers' Final Moments: ‘It’s Terrifying’ (Exclusive)

The brother of Chris Morvillo, who was among seven people who died when a superyacht named Bayesian sank in August, is speaking out in a new interview about the tragedy that occurred off the coast of Italy.

In an exclusive clip from IMPACT x Nightline’s Gone In 16 Minutes: Sinking of The Superyacht, Greg Morvillo says he “broke down” crying after learning through a phone call that his brother had died on Monday, Aug. 19.

During the interview, which will stream only on Hulu beginning Thursday, Nov. 14, Greg reveals he “can’t stop thinking about” what the final moments were like for the seven victims.

“I think about the last few moments for them on the ship all the time,” Greg says. "It's haunting. It's terrifying.”

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He adds, “I cannot imagine what they were going through. I can’t imagine how it felt or what they knew. It is impossible to wrap my mind around. But I can’t stop thinking about it."

Chris was the lawyer for British tech entrepreneur Mike Lynch, who also died after the superyacht capsized. Mike’s 18-year-old daughter died as well, as did Chris’ wife Neda.

A source close to the survivors previously confirmed to PEOPLE that Mike was celebrating his fraud acquittal on the yacht when it sank. Chris represented Lynch in the lengthy legal saga in the United States that dated back to 2011.

Ed O’Callaghan, a former Justice Department official and close friend of the attorney, previously told PEOPLE that Chris hoped to spend time with his wife and their two adult daughters, Sabrina and Sophia Morvillo.

“He missed a lot,” O’Callaghan said at the time. “He was just buried in putting together the defense for Lynch. And I think he really thought the near future was going to be a lot of wonderful payback time with the family.”

In the new episode of IMPACT x Nightline, Greg claims he knew in his heart that a phone call about his brother’s death was coming after learning the yacht had capsized. Still, he was devastated when the news was confirmed to him.

“I hung up and I broke down,” Greg recalls. “Wailing is the only way that I can describe it. It was awful.” 

Also interviewed for the episode are numerous people who were close to Mike and his family, including two of his daughter Hannah’s friends, Marko Kresojevic and Benedict Macklow-Smith.

Captain Glenn Shephard, a sailing yacht captain and star on the Bravo reality series Below Deck Sailing Yacht, The Sunday Times correspondent Danny Fortson and more are featured in the episode, led by Nightline co-anchor Juju Chang, as well.

IMPACT x Nightline’s Gone In 16 Minutes: Sinking of The Superyacht premieres Thursday, Nov. 14, exclusively on Hulu.