Goldman Sachs staffer’s death stokes fears of ‘darker forces,’ connected killings. John Castic also found dead after after a Zeds De

Friends of Goldman Sachs senior analyst John Castic, who was found dead Tuesday in a New York City creek weeks after another young man met a similar fate after vanishing from the same music venue, called the circumstances sinister and suspicious.

"I think there’s foul play," said Sara Kostecka, 25, of Chicago, who spearheaded a search effort for Castic, 27, when he disappeared early Saturday.

"None of this makes sense to any of us. We want to know what happened. This was not an accident," Kostecka told Fox News Digital.

Another pal, William Sullivan, 31, of the East Village, agreed with Kostecha. "There might be some darker forces at play," he said.

Castic was last seen outside the Brooklyn Mirage at 2:30 a.m. Saturday after a Zeds Dead show. Four days later, his shirtless body was fished out of Newtown Creek.

Six weeks earlier, another man, psychologist Karl Clemente, 27, was turned away from the venue for alleged drunkenness. Five days later, on June 16, he was also found in a remote section of the toxic waterway that divides Brooklyn and Queens.

Police suspect both men died accidentally, but experts told Fox News Digital it was too soon to draw that conclusion, with one retired detective suggesting that their demises could be linked to the Smiley Face Killers theory.

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