How to watch new Gilgo Beach killer doc ‘Killing Grounds’ for free

Amid major developments in the case, a new documentary series about the Gilgo Beach murders is making its way to Prime Video.

“Killing Grounds: The Gilgo Beach Murders” is a four-part documentary series that premieres today, April 22, just two weeks after suspect Rex Heuermann pleaded guilty to eight counts of murder for deaths dating back to 1993.

The Massapequa Park, New York native admitted to killing Amber Lynn Costello, 27; Megan Waterman, 22; Melissa Barthelemy, 24; and Maureen Brainard-Barnes, 25, who were famously known as the “Gilgo Four” — as well as Valerie Mack, 24; Jessica Taylor, 20; and Sandra Costilla, 28, his first victim in 1993; and Karen Vergata, 34, whose 1996 murder had not previously been linked to him.

“He will serve three consecutive life sentences with no chance of parole,” prosecutors said. He will be sentenced on June 17.

Per Prime Video’s official synopsis, “this chilling series unravels one of the most notorious criminal cases of our time, offering a comprehensive look at the investigation as new developments bring long-awaited answers closer into focus.”

‘Killing Grounds: The Gilgo Beach Murders’ documentary release date

All four episodes of “Killing Grounds: The Gilgo Beach Murders” were released on Prime Video today, April 22.

How to watch ‘Killing Grounds: The Gilgo Beach Murders’ documentary for free

“Killing Grounds: The Gilgo Beach Murders” is an Amazon Original, so you’ll need a Prime Video membership to tune in.

If you aren’t a Prime Video subscriber yet, you can get started with a 30-day Amazon Prime free trial, including Prime perks, such as the Prime Video streaming service, free two-day shipping, exclusive deals, and more. After the free trial, Amazon Prime costs $14.99/month or $139/year.

All 18- to 24-year-olds, regardless of student status, are eligible for a discounted Prime for Young Adults membership with age verification. After six months at $0, you’ll pay 50% off the standard Prime monthly price of $14.99/month — just $7.49/month — for up to six years and get all the perks.

‘Killing Grounds: The Gilgo Beach Murders’ trailer

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This article was written by Angela Tricarico, Commerce Streaming Reporter for Post Wanted Shopping, Page Six, and Decider.com. Angela keeps readers up to date with cord-cutter-friendly deals, and information on how to watch your favorite sports teams, TV shows, and movies on every streaming service. Not only does Angela test and compare the streaming services she writes about to ensure readers are getting the best prices, but she’s also a superfan specializing in the intersection of shopping, tech, sports, and pop culture. When she’s not writing about (or watching) TV, movies, and sports, she’s also keeping up on the underrated perfume dupes at Bath & Body Works and testing headphones. Prior to joining Decider and The New York Post in 2023, she wrote about streaming and consumer tech at Insider Reviews.