An Arlington man could get up to life in prison if he’s convicted of a string of sexual assaults dating back as far as 2005. Police say he targeted co-eds at two local universities. He was arrested thanks to new technology and the work of a special unit working with the U.S. Attorney and others to close sex assault cases.
Ernesto Ramon Mercado, 54, is charged with first and second-degree sexual abuse in connection with a series of home invasion rapes. He’s linked to a total of six assaults between 2008 and 2012.
“These cases stem from six unsolved home invasion rapes,” Metropolitan Police Department Chief Pamela Smith said. “Five of these crimes occurred in the Georgetown, Glover Park area of Northwest D.C. and one near the University of Maryland in College Park.”
Investigators say Mercado targeted young women living in off-campus shared residences, and he struck late at night or during the hours before dawn.
“In each case, Mercado likely identified his victims through stalking and peeping Tom activities,” said MPD detective Alexander Mac Bean.
Police say he’d pick intoxicated victims, usually as they walked home, and he’d wait till the victim was asleep to break in or get in through an unlocked door.
He came to be known as the “cuddler,” but the lead investigator in the case says that term belies the seriousness of the crimes he’s charged with and the harm the victims have suffered.
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“This man is a predator, and his intent was not to cuddle these women, but instead his intent was to rape them,” Mac Bean said.
How DNA and genealogy helped police find the suspect
Police got DNA from the scenes. They couldn’t identify who it came from but knew it was from the same person.
Court documents show police homed in on Mercado through DNA profiles submitted to a consumer genealogy service.
It's an investigative tool known as genetic genealogy. Police can look up DNA profiles found at a crime scene to find people who are related to the suspect, narrowing down the pool of potential perpetrators.
It’s possible a relative of Mercado’s was creating a family tree, and police followed the branches as the cold case heated up fast.
Police staked out Mercado's Arlington home and got a warrant for Mercado's DNA on Monday.
“We obtained that sample yesterday morning, submitted it for rapid DNA analysis — another tool that has only recently come into existence — and had a DNA match by early afternoon,” U.S. Attorney Matthew Graves said.
“The reward from a case like this is being able to tell a victim years later that we’ve identified the perpetrator that committed this crime,” Mac Bean said.
When Mercado was arrested, time was of the essence.
Investigators found that he may have been a rideshare driver. They considered the possibility that he could seek more victims through that work.
Police hope that by releasing pictures of Mercado anyone else who’s had an encounter with him will come forward.
Police believe Mercado is responsible for dozens of sexual assault, burglary and voyeurism cases and there may be additional victims. Anyone with potentially relevant information or who may have been the victim of a related attack is asked to contact police.
