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Germantown Serial Rapist Sentenced to Two Life Sentences

He remained free for years after committing a series of heinous crimes, but he will never experience freedom again.

Marlon Michael Alexander, 40, of the 13000 block of Dairymaid Drive in Germantown, pled guilty to first-degree rape and first-degree sex offense in on February 2 and on Tuesday he was sentenced to two concurrent life sentences in prison after investigators used a DNA technology company to link his DNA to DNA left at crime scenes dating back to 2007.

After his arrest in September, Alexander was charged with two counts of first-degree rape, one count of second-degree rape, three counts of a first-degree sexual offense, four counts of burglary, and one count attempted first-degree sexual offense. Alexander was indicted by a Grand Jury in November.

Alexander, who is married with four children, was sentenced to two consecutive life terms in prison by Montgomery County Judge Robert Jordan, who said the nature of the offenses — two of his victims were elderly women.

Alexander began his series of burglaries and rapes a little over 11 years ago on August 11, 2007, at approximately 1:00 am when police say that he gained entry into the home of a 25-year-old woman, while she was living in the 18200 block of Lost Knife Circle in Gaithersburg. He put an unknown weapon to her head and threatened the victim that he would shoot her if she did not perform a sexual act. A struggle ensued, and the suspect fled from the residence. Police said that the suspect left some DNA evidence at the scene and it was recovered in this case.

The next attack took place three years later on June 19, 2010, when he gained entry into a 68-year-old woman’s home in the 20300 block of Beaconfield Terrace in Germantown at 3:20 am and raped her. The suspect left DNA evidence which recovered in this case.

The next attack took place two months later on August 21, 2010, at approximately 4:15 am, when the suspect forced entry into the 86-year-old woman’s apartment at the assisted living center in the 2100 block of Father Hurley Boulevard in Germantown and raped her. Suspect DNA recovered in this case matched the suspect DNA recovered from the June 19, 2010, sexual assault.

Four months later, police say Alexander returned to the Beaconfield Terrace home of the first 68-year-old victim and raped her again. This took place on January 5, 2011, at 12:45 am. Again DNA evidence matched the DNA evidence from the previous two rapes.

In June of 2017, cold case detectives sought the services of Reston, Va.-based Parabon NanoLabs, a DNA technology company that specializes in DNA phenotyping: the process of predicting physical appearance and ancestry from unidentified DNA evidence. Using DNA evidence from body fluids left by the suspect at these rape scenes, Parabon’s Snapshot DNA Phenotyping Service has produced what the company and police refer to as a Snapshot composite depicting how the suspect, in this case, may have looked.

Using Parabon’s Snapshot DNA and the company’s access to DNA database records from other DNA subscription services such as Ancestry.com or 23-and-me.com, detectives received names of possible distant family members of the suspect.

Police are crediting Patrol Officer Steve Smugeresky, or “Smugs” with doing the legwork work associated with tracking down family names members of people sharing the names and through searching through Census Bureau records and newspaper obituaries to narrow down the field of possible suspects. Police said Smugeresky, who was assigned to the Germantown District when the crimes occurred, (he has since been reassigned to another unit in MCPD) was able to identify six family trees and eventually hit on a woman in Georgia who told him that she had connections to Montgomery County.

In June of 2017, police released a DNA Snapshot composite sketch based on the DNA evidence left by the suspect at the crime scenes which produce trait predictions for the suspect. Individual predictions were made for the subject’s a