Redditor shares picture mocking suspected Gilgo Beach killer Rex Heuermann — taken nearly 8 years before capture: ‘Crazy s—t’

A stunned Long Islander unknowingly posted a picture of Gilgo Beach serial killing suspect Rex Heuermann all the way back in 2015 — almost eight years before the hulking architect would be charged with a string of gruesome murders.

The unnamed commuter, a former CVS employee, posted the image of Heuermann nursing a tall can of beer in a brown paper bag while riding the Long Island Railroad Babylon line.

Wearing glasses and with a brown leather jacket hung nearby, the accused killer appears to be working on a tablet in the haunting picture dated March 9, 2015.

“Me in 10 years if I stay at CVS and continue to eat fried food everyday,” the man wrote to his handful of Instagram followers at the time.

The startled poster wrote last month how he later realized the man he randomly photographed and lampooned that day would later draw global infamy.

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“Nine years ago I made this dumb post about getting fat and unknowingly posted this picture of Rex Heuermann,” he wrote on Reddit.

Shocked posters asked if he realized he had taken Heuermann’s picture when his arrest broke last July.

“Dude, absolutely not,” he said. “I randomly just thought about this picture today. Then remembered the guy resembling him. Said to myself “would be funny if it was him lol”. Then looked at it. Same train line. Saw him plenty of times. One day decided to make a dumb instagram post about fear of letting myself go. 9 years later (today) realized i struck true crime gold. Crazy s—t.”

Some posters took exception to what they viewed as his fat-shaming a stranger in the post and putting his picture on Instagram without his knowledge.

But the user — who said he now works in the entertainment industry — noted he was much younger at the time and assumed that the post would only be circulating among a small group of friends.

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“I didn’t post for clout or recognition,’ he said in his defense. “I was being facetious to the 30-40 friends on there exclusively people I knew in real life to spark a dumb laugh.”

Others staunchly baked his efforts — especially in retrospect.

“This guy roasted the LISK before we even knew of his crimes,” the user wrote, referring to the Long Island Serial Killer.

Eleven bodies, including the “Gilgo Four,” were found between December 2010 and April 2011 along a desolate stretch of Ocean Parkway on Long Island.

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More than a decade later, Heuermann has been tied to the murders of the women known as the Gilgo Four.

He was linked to three — Melissa Barthelemy, Megan Waterman and Amber Lynn Costello — through DNA found on a discarded pizza box, prompting his arrest on July 13, 2023.

Heuermann was then later connected to the July 9, 2007, slaying of Maureen Brainard-Barnes, the first of the “Gilgo Four” to go missing while working as a prostitute, through DNA evidence taken off of the Monster Energy beverage.

He’s now charged with three counts of first-degree murder and four counts of second-degree murder and has pleaded not guilty.

Heuermann is due back in court on April 17.