The U.S. Marshals Service for the District of Columbia Superior Court, in cooperation with the Metropolitan Police Department Sexual Assault Cold Case Unit, as well as other law enforcement partners, executed an arrest warrant for Ernesto Ramon Mercado in connection with five sexual offences that occurred within the District of Columbia between 2008 and 2012.
Following his arrest, Mercado was arraigned at DC Superior Court on three counts of first-degree sexual abuse with aggravating circumstances and five counts of second-degree sexual abuse with aggravating circumstances in connection with a series of six unsolved, forensically linked home invasion burglary/rape offences.
Five of the attacks occurred in the Georgetown area of Northwest Washington, and the sixth occurred just off the campus of the University of Maryland in College Park, Maryland. Evidence testing in all six cases yielded the same unknown male DNA profile.
Each of the victims had described waking up after a night out to find someone with them in their residence. A man would be on top of them or beside them in their bed, raping or attempting to rape them. The man would run away when the victim screamed or began to fight back.
Investigators suspect Mercado as the perpetrator of dozens of unsolved cases of voyeurism, burglary and other offences across the region in this same time period, though he has not been charged in those crimes.
This is an ongoing investigation led by the Cold Case Sexual Assault Initiative, a collaboration between the Metropolitan Police Department and the U.S. Attorney’s Office.
Significant assistance is being provided by the U.S. Marshal’s Service’s Superior Court Unit, the FBI Investigative Genetic Genealogy Team, the FBI’s Baltimore and Washington Field Offices, the D.C. Department of Forensic Sciences, and the Arlington County Police Department.
