Mystery deepens as John Castic's cause of death revealed after Goldman Sachs analyst was found in shallow creek
Christopher Harper
Published Sep 05, 2026
A GOLDMAN Sachs senior analyst who was found in a creek days after going missing died by drowning, his dad has said.
John Castic’s remains were discovered in a New York City shallow creek on August 1.
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The 27-year-old was reported missing after he was last seen leaving the Brooklyn Mirage nightclub following a Zeds Dead show early last Saturday morning around 2.30am.
His dad Jeffrey told The New York Post that John died from drowning.
It remains unknown how he ended up in the water.
Relatives do not suspect that foul play was involved in his death.
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Meanwhile, medical examiners had not disclosed a cause of death, with a spokeswoman saying: “The final determination is pending results of toxicology testing.”
Earlier this week, Jeffrey told the Daily Mail that John may have died from a peanut allergy.
He said: “We think he either had an allergic reaction – he was allergic to peanuts and maybe ate something without realizing that it contained peanuts – or there was an undetected allergy mixed with alcohol.”
Jeffrey told Fox News that his son was a “bright, charismatic, caring, and hardworking young man.”
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John’s remains were pulled from the water when a man saw a shirtless body floating in the English Kills section of Newtown Creek – less than half a mile from where he was last seen.
The Goldman Sachs worker had his cell phone and wallet on him.
John reportedly told his pals at the venue he was going to catch an Uber ride home to his apartment in Manhattan's Lower East Side, but he never made it there.
His friend Jonah Shales told Fox News that Castic's phone died sometime after he left the club.
Shales said at the time that no one had contact with him.
Jeffrey told the Daily Mail that John told his friends that he felt unwell before leaving the gig.
Surveillance footage obtained by WPIX showed John wearing a floral shirt and pants and walking near a pizza vending truck on the night he disappeared.
The U.S. Sun approached the Brooklyn Mirage for comment.
John graduated from DePaul University in 2020 and started working as a senior analyst at Goldman Sachs about a year ago, according to his LinkedIn profile.
David Solomon, the CEO of Goldman Sachs, described John as a “dedicated and driven” worker.
He said: “John will be deeply missed by his Goldman Sachs family.”
John’s disappearance came just over a month after Karl Clemente vanished from the same Brooklyn venue and was also found dead in Newtown Creek.
Clemente and his friends when to the Brooklyn Mirage at around 9pm on June 11.
But Clemente was turned away on suspicion that he had been drinking, the Daily Mail reported.
He disappeared after heading to a gas station near the venue, according to the outlet.
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Five days later, Clemente's body was discovered in the creek behind a lumber warehouse.
The New York Police Department has not made any connection between the cases.
