In 2001 DNA Evidence Didn’t Point to Albert DeSalvo as the Boston Strangler. New DNA Tests Do. What Gives?

A blog about murder, theft, and other wickedness.
July 11 2013 4:28 PM

In 2001 DNA Evidence Didn’t Point to Albert DeSalvo as the Boston Strangler. New DNA Tests Do. What Gives?

desalvo
Albert DeSalvo, center, is captured after escaping from Bridgewater State Hospital in 1967.

Federal Bureau of Investigation, via Wikimedia Commons

Crime is Slate’s crime blog. Like us on Facebook, and follow us on Twitter @slatecrime.

On Thursday morning Boston prosecutors announced they had found a familial DNA match connecting the long-dead Albert DeSalvo with the 1964 murder of Mary Sullivan. Almost 50 years ago, DeSalvo confessed to being the Boston Strangler, the serial killer suspected of sexually assaulting and killing Sullivan and 10 other women in the Boston area during the early 1960s—but there was no physical evidence connecting him to the crimes. Recently Boston authorities retrieved a water bottle discarded by one of DeSalvo’s nephews, and compared the DNA from the bottle with 50-year-old forensic evidence that had been preserved from the Sullivan crime scene. Now, a judge has ruled that authorities can exhume DeSalvo’s corpse to see if further testing might directly connect DeSalvo with Sullivan’s murder.

Advertisement

The lack of hard evidence connecting DeSalvo to the crimes has led many to question whether he was actually responsible for the Strangler murders. (The Sullivan case is the only one of the Strangler murders in which physical evidence remains.) Susan Kelly, author of a book on the crimes, once told CBS that “it's very interesting to me that the details that Albert got wrong in his confession were identical to the details that the newspapers got wrong.” And in 2012 former Massachusetts Attorney General Edward Brooke told the Boston Globe that “Even to this day, I can’t say with certainty that the person who ultimately was designated as the Boston Strangler was the Boston Strangler.”

This isn’t the first time that authorities have used DNA testing to try and link DeSalvo with the Strangler crimes. In 2001 a team of forensic investigators took a mitochondrial DNA sample from Albert DeSalvo’s brother, Richard DeSalvo, and tested it against DNA samples extracted from a dried, semenlike liquid found entangled in the pubic hair of Mary Sullivan’s exhumed body. The samples didn’t match. “We couldn't find anything on the remains that was consistent with Albert DeSalvo, DNA-wise,” recalls Dr. David Foran, a forensic scientist who directed the DNA team that analyzed the 2001 samples.

So, did DeSalvo do it or not? “Our results didn't point to guilt,” Foran tells me. “Other people would take those results and say, ‘Well, that means he's innocent.’ But those are different things.”

The discrepancy between the 2001 results and today’s announced match might come down to the different samples analyzed by the different labs. “What [the 2013 investigators] have are slides from the crime scene that have semen on them, presumably from the perpetrator,” says Foran, whereas his team examined samples taken from Sullivan’s exhumed corpse. “One thing that confuses me is why they didn't test those 15 years ago, because they could have. And we certainly did ask for them back then.” Add that to the long, long list of questions about the Boston Strangler case that might never get answered.

Justin Peters is a writer for Slate. He is working on a book about Aaron Swartz, copyright, and the rise of “free culture.” Email him at justintrevett@fastmail.fm.

TODAY IN SLATE

Politics

Meet the New Bosses

How the Republicans would run the Senate.

Even by Russian Standards, Moscow’s  Anti-War March Was Surprisingly Grim

I Wrote a Novel Envisioning a Nigerian Space Program. Then I Learned Nigeria Actually Has One.

Photos of the Crowds That Took Over NYC for the People’s Climate March

Friends Was the Last Purely Pleasurable Sitcom

The Eye

This Whimsical Driverless Car Imagines Transportation in 2059

Medical Examiner

Did America Get Fat by Drinking Diet Soda?  

A high-profile study points the finger at artificial sweeteners.

The Government Is Giving Millions of Dollars in Electric-Car Subsidies to the Wrong Drivers

A Futurama Writer on How the Vietnam War Shaped the Series

Trending News Channel
Sept. 20 2014 11:13 AM Watch Flashes of Lightning Created in a Lab  
  News & Politics
Politics
Sept. 22 2014 11:13 AM Your Own Personal Rand Paul How the libertarian hero makes his foreign policy contradictions disappear.
  Business
Moneybox
Sept. 22 2014 12:07 PM Divestment Isn’t the Answer To destroy demand for fossil fuels, universities can do a lot better than just selling some stocks.
  Life
Dear Prudence
Sept. 22 2014 12:00 PM Dear Prudence Live Chat For September 22, 2014.
  Double X
The XX Factor
Sept. 19 2014 4:58 PM Steubenville Gets the Lifetime Treatment (And a Cheerleader Erupts Into Flames)
  Slate Plus
Science
Sept. 22 2014 8:08 AM Slate Voice: “Why Is So Much Honey Clover Honey?” Mike Vuolo shares the story of your honey.
  Arts
Brow Beat
Sept. 22 2014 11:32 AM South Park Takes on Washington’s NFL Team and Its Terrible Name
  Technology
Future Tense
Sept. 22 2014 11:23 AM Robot Plants Are the Latest in a Long Line of Robot Thingies
  Health & Science
Bad Astronomy
Sept. 22 2014 11:23 AM Two Impacts, One Landslide… on Mercury
  Sports
Sports Nut
Sept. 18 2014 11:42 AM Grandmaster Clash One of the most amazing feats in chess history just happened, and no one noticed.