The drop in the lake's water level could result in other bodies being found at the lake, Spencer said. Rangers with the National Park Service find one or two bodies at Lake Mead every year, he said, "so it's not uncommon to work a homicide out at the lake."
Experts at the University of Nevada, Las Vegas, will help them identify the remains and determine the age of the barrel's metal, Spencer said.
Since the victim was killed in the 1980s in an area near Las Vegas, where mob-connected casinos dominated the Strip, investigators will "definitely not rule out" that the killing may have been Mafia-related, Spencer said.
"We are going to look at that potential possibility," he said.
The barrel was discovered about 3 p.m. Sunday afternoon by people walking along the shoreline of Lake Mead — America's largest man-made reservoir, which is about 40 miles east of Las Vegas and was formed by the construction of Hoover Dam.
They saw the corroded, rusted barrel embedded in mud, its beige exterior covered in barnacles, Spencer said. While the sun shined on nearby boaters floating in the water, they peeked their heads inside and discovered a skeleton.
"We were docking our boat to go home and heard a woman scream," Shawna Hollister, a witness to the discovery, told KLAS-TV in Las Vegas. "My husband walked over and found the body. His shirt and belt were the only thing we could see over his decomposing bones."
Photos of the barrel obtained by KLAS-TV show it on its side, close to the receding shoreline, with a boat floating in the background.
Witnesses called the National Park Service, which responded and confirmed that the contents inside were in fact human remains, Spencer said. The National Park Service then called the Las Vegas Metropolitan Police Department, which is investigating.
Investigators also plan to scan missing-person cases from the 1980s to search for clues, Spencer added.
The investigation could take years because the police are starting "at square one," Spencer said.
"In the 1980s, we did not have any of the DNA databases, so there was no DNA collection," he said.
If investigators are able to recover DNA samples from the remains, it will take extensive genealogy work to determine the person's identity, Spencer said.
Since 2000, the elevation of Lake Mead has dropped by nearly 150 feet because of "drought and climate change," according to the Southern Nevada Water Authority.
Recent conditions have resulted in more significant water level declines. On Sunday, the Southern Nevada Water Authority issued mandatory summer water restrictions.
In August, the federal government for the first time declared a water shortage at Lake Mead, triggering cuts in water supply for the region.
This article originally appeared in The New York Times.
Written by: Eduardo Medina
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