This year marks the 20th anniversary of Gianni Versace‘s untimely death. The fashion designer’s life and murder have fascinated people over the past two decades, and in a recent Dateline investigation, his longtime partner finally spoke out.

His net worth, or what it could’ve been, has also intrigued those who have followed the Italian native’s brand, which is now led by Gianni’s sister Donatella. According to Forbes magazine, based on Versace brand recently being valued at about $1.4 billion, his net worth would’ve been estimated to be around $680 million.

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After struggling financially for years following his death, the company returned to profit in 2011 and a 20 percent stake in the brand was sold to a private equity firm in 2014. Today, his niece Allegra, the largest shareholder, is reaping the benefits of his talent. Along with his wealth, The Death of Gianni Versace: A Dateline Investigation special also looked at the months-long manhunt for his killer Andrew Cunanan.

“I heard the shot. My heart just stopped to beat,” his former partner Antonio D’Amico said. “So I ran out and then I saw Gianni laying down on the stairs in blood.”

In an interview in 2008, Donatella revealed she almost quit the fashion industry following the death of her brother. “I didn’t want nothing to do with fashion anymore because of the pain and I thought fashion would not exist without my brother,” she told Time magazine. “… I continue to fight for the Versace brand to be alive, to survive, and to be better and better, so that made me find the strength to go on.”

Gianni and Donatella will also be portrayed by actor Edgar Ramírez and Penélope Cruz in the next installment of American Crime Story, set to premiere Jan. 17. Ricky Martin is also starring in the FX mini-series as Antonio while Darren Criss will take on the role of his murderer.