Jayson Williams says he was “being a coward” when he sought in 2002 to cover up the accidental shooting death of limousine driver Gus Christofi.

In an interview with “60 Minutes Sports” set to premiere at 8 p.m. Tuesday on Showtime, the former Net said his attempt to cover up the shooting at his New Jersey mansion “was selfishness . . . me trying to protect myself.”

Williams, 48, spoke from a rehab center in Florida. He drank heavily before and after the shooting, and after being released following 26 months in prison in April 2012.

At the peak of his drinking, Williams said, he was going through “a fifth of moonshine” daily.

Williams has remained at the rehab center even after his 30-day initial stay ended.

“I’ve quit trying to protect myself,” he says on the show. “I just try to live right and let the pieces fall where they may.”

Williams was arrested for driving under the influence after his release from prison.

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“I messed up; I’m sorry,” he says. “I wish you would give me another chance. Not a second chance because I wasted my second chance. It hurts me when I look up and people give up on me.”