It has never been easier to be an undetected serial killer in the United States.

That’s the opinion of two experts in the field of collecting murder data in America. And both men say that as you read this there are thousands of active serial killers roaming the U.S. Some operate in big cities, others prefer the wide open spaces of rural America.

Here’s the most frightening part: Since only about 60 percent of murders are solved these days that means about 40 percent of the time, murderers will get away with it. If the uncaught are serial killers – that being someone who has committed two or more separate murders often with a sadistic sexual component – they will very likely murder again.

The FBI maintains that serial killers account for fewer than 1 percent of all murders but that assertion has been challenged by experts at the Murder Accountability Project. MAP’s founder Thomas Hargrove and Director Michael Arntfield, the aforementioned experts in the field of murder data, believe savvy serial killers are responsible for a considerable number of those unsolved killings.

Hargrove and Arntfield maintain that government murder statistics are sorely out of whack with reality. In large part because thousands of murders, specifically indigenous women and girls, have gone uncounted. MAP has now sued the DOJ, FBI, Bureau of Indian Affairs, Department of Defense and other federal agencies for failing to keep an accurate count as required by a 1988 law. They offer as evidence their carefully maintained data base, the largest in the nation.

“There are more than 222,000 unsolved murders since 1980,” Hargrove said. “I’ll say almost every major American city has multiple serial killers and multiple uncaught serial killers.” Hargrove pegs the current number of active serial killers in the U.S. at more than 2,000.

Arntfield, a former police detective and author of 12 books, thinks the number is much higher – between 3,000 and 4,000 active serial killers. He attributes the high percentage of unsolved murders to several things: the dissolution of communities where people look out for each other, less experienced police detectives being assigned to homicide cases, smarter killers who learned from television how to fool cops by staging scenes or planting meaningless evidence and occupations such as long distance truckers that make detecting serial killers next to impossible.

“The (FBI’s) Highway Serial Killer Initiative has about 400 to 450 offender profiles of unidentified subjects on its database alone that are involved in the trucking industry,” Arntfield said. These drivers can cover the entire Interstate system in the United States, frequently traveling through isolated areas and into Canada. They might pick up a stranger in one state and when the unidentified body is found several states away police have few clues to follow. Other top occupations of known serial killers, Arntfield writes in his book Murder in Plain English, include police officers, military personnel, forestry workers, hotel porters and warehouse managers.

And in case you wondered, a majority of serial killers (52%) are white men. Their favorite weapon, according to Arntfield, was a gun (42%) but some used poison and a few preferred an ax.

It is important to note that none of Arntfield’s findings pertained to Samuel Little, 79, now identified by the FBI as the most prolific serial killer in American history. Little is a Black man. He worked as a boxer and an ambulance attendant. He said he strangled women to death for the sexual pleasure of it. He has confessed to murdering 93 women over four decades beginning in 1970. The FBI believes all his confessions are credible.

A sad sidebar to all these statistics. A majority of the victims of serial killers are women. Many come from hard knock backgrounds. Some are prostitutes, many are addicted to drugs. None of that means their murders should be ignored. And it doesn’t mean federal agencies should fail to include them in the official murder tally.

Diane Dimond is a syndicated columnist and television reporter of high-profile court cases.

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