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Sheriff credits podcast after 1975 cold case victim, formerly known as “Mr. X,” is identified

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The cold case of a man known as “Mr. X” has seen a significant breakthrough after nearly half a century, South Carolina police said Monday.

The Greenville County Sheriff credits a true crime podcast — “Murder, Etc.” — for drawing attention to the case, which dates back to 1975 when the remains of “Mr. X” were found by a hunter in the South Carolina city. The remains were “found wrapped in a sheet and smoldering, indicating that they had been set on fire,” the sheriff’s department said in a news release Monday. The death was ruled a homicide, with the man subject to blunt force trauma and strangulation. Police were unable to identify him despite “numerous outreach efforts over the years.” 

Then in 2020, Greenville Sheriff Hobart Lewis “revamped” the town’s cold case unit to focus on re-examining cases with new technology. Since then, 11 cases have been solved, the sheriff’s department said. 

The cold case unit was able to identify the man known as “Mr. X” as Oscar James Nedd of White Plains, New York. Nedd was born in Georgia in April 1951 and later moved to New York for college, the department said. 

448161567-770105128637187-2429742324222110331-n.jpg
Oscar James Nedd.

Flood, Ryan/Greenville County Sheriff’s Office


The podcast “Murder, Etc.” covered his case in a live episode in 2020.  

Investigators from the sheriff’s office worked with the county coroner’s office that same year to exhume the body from where it had been buried, and sent some of the remains to the National Unidentified and Missing Persons System for DNA testing. A DNA profile was created for the victim in that database. In February 2024, the White Plains Police Department contacted investigators to say the profile matched Nedd’s missing persons case filed there. 

Family members were contacted and investigators were able to confirm Nedd’s identity.

“The tireless work and innovative approaches employed by our investigators have brought closure to a case that has remained a mystery for nearly five decades,” Lewis said in the news release. “Their determination to seek justice for victims and their families is truly commendable. I want to thank each member of our cold case unit for their hard work and commitment.”

It’s believed that Nedd was killed in New York, the sheriff’s department said. CBS News affiliate WSPA reported that the remains were then transported to South Carolina. White Plains authorities are now investigating the homicide. 



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What to know about fluoride in water following RFK Jr.’s health claims

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Robert F. Kennedy Jr.’s recent comments on fluoride are prompting questions about its safety and why it’s used in drinking water.

Kennedy, a former presidential candidate turned Trump supporter who has long shared anti-vaccine views, said on social media Saturday that Donald Trump would push to remove fluoride from drinking water on his first day in office if elected president. Trump has previously suggested he’d put Kennedy in charge of health initiatives.

On Sunday, Trump told NBC News he had not spoken to Kennedy about fluoride yet, “but it sounds OK to me. You know it’s possible.”

In a post on social media, Kennedy claimed fluoride is linked to a slew of health problems.

Why the fear over fluoride? Here’s what to know. 

What is fluoride?

Fluoride is a mineral that helps strengthens teeth and reduces cavities, according to the U.S. Centers for Disease Control and Prevention. It does this by repairing and preventing damage to teeth caused by bacteria in the mouth that produce acid, which in turn dissolves minerals in a tooth’s surface and can even lead to tooth loss. 

Tooth decay by itself can be painful and costly to treat but left untreated can cause further problems, including infections and abscesses or even sepsis, according to the World Health Organization

Some research has also linked poor oral health to other complications such as cardiovascular disease due to inflammation and infection.

This is why experts urge prevention as the best way to keep your dental (and overall) health in check. 

Why fluoride is in water and its health benefits

“Almost all water contains some naturally occurring fluoride, but usually at levels too low to prevent cavities,” the CDC’s website notes. 

In 1950, federal officials endorsed water fluoridation — adding a small quantity of fluoride to the water supply — to prevent tooth decay. Fluoride can come from a number of sources, including most toothpaste brands, but researchers say drinking water is the main source for Americans.

“Studies continue to show that widespread community water fluoridation prevents cavities and saves money, both for families and the health care system,” the CDC says, noting that this step has reduced tooth decay in children and adults by about 25%.

Dr. Naomi Levy Goldman, cosmetic and restorative dentist and owner of Levy Goldman Dentistry, told CBS News that, at recommended levels, studies have shown drinking fluoridated water is “beneficial for preventing dental decay, especially in the first three years of life when the primary and permanent teeth are still developing.”

“Studies also show that consuming fluoridated water at the current recommended levels should not cause neurotoxicity or other adverse effects,” she said.

Is fluoride in drinking water safe?

The recommended fluoride concentration in drinking water is 0.7 milligrams of fluoride per liter of water, which is about equal to 3 drops in a 55-gallon barrel, according to the CDC. 

In 2015, officials lowered the recommendation for drinking water fluoride levels to address fluorosis, a condition that can cause discoloration on teeth.

“The severity of the white spots (or fluorosis of the enamel) seems to increase with higher concentrations of fluoride,” Levy Goldman said. “One study noted about 12% of people would have some level of flourosis of the enamel from drinking fluoridated water at 1ppm.”

Overall, the addition of low levels of fluoride to drinking water is considered by health officials to be one of the greatest public health achievements of the last century.

“Seventy years of research, thousands of studies and the experience of more than 210 million Americans tell us that water fluoridation is effective in preventing cavities and is safe for children and adults,” according to the American Dental Association.

But it hasn’t gone without controversy. 

Earlier this year, the National Institutes of Health’s toxicology program determined “with moderate confidence” that there is a link between higher levels of fluoride exposure and lower IQ in kids. The federal agency based its conclusion on studies involving fluoride levels at about twice the recommended limit for drinking water.

The American Academy of Pediatrics has questioned the validity of the NIH’s report, saying other reviews have come to different conclusions about fluoride’s risks and benefits. The AAP is among the expert groups that continue to recommend using fluoride toothpaste, in combination with fluoridated water, to protect teeth from cavities.

U.S. District Judge Edward Chen later cited the NIH study in ordering officials to further regulate fluoride in drinking water. 

While the judge was careful to say that his ruling “does not conclude with certainty that fluoridated water is injurious to public health,” he said that evidence of its potential risk was now enough to warrant forcing the Environmental Protection Agency to take action.

Critics have cited near-universal adoption of fluoride toothpaste and other dental products as evidence that the chemical no longer needs to be added to drinking water. Other countries abroad have cut cavity rates without adding it to their water supplies, they argue.

The CDC has said that continued water fluoridation is still the “most cost-effective method of delivering fluoride to all members of the community regardless of age, educational attainment, or income level.”

CBS News has reached out to the American Dental Association for commentary.  

and

contributed to this report.



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Nov 4: CBS News 24/7, 1pm ET

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Nov 4: CBS News 24/7, 1pm ET – CBS News


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Harris and Trump make final appeal to voters; Damaging storms roll through Oklahoma.

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What to know about new polls, fresh Election Day data

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What to know about new polls, fresh Election Day data – CBS News


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CBS News will receive fresh polling data throughout Election Day. CBS News executive director of elections and surveys Anthony Salvanto previews what to expect as more information becomes available.

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