St. Mary's Co. Barricade and Arrest in Lexington Park

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On September 8, 2020, at approximately 9:04 p.m. deputies from the St. Mary’s County Sheriff’s Office responded to the 46300 block of Columbus Drive in Lexington Park, for the reported assault. The investigation determined Marcus Isaiah Peterson, age 31 of Lexington Park, assaulted the victim by striking the victim in the face several times. Deputies attempted to contact Peterson during the investigation, but Peterson refused to exit the residence, and was observed outside on a balcony yelling profanities and causing a disturbance. Peterson continued to refuse to cooperate with law enforcement and exit the residence; there were several juveniles confirmed to be inside the residence with Peterson. A barricade was declared and members of the Critical Incident Negotiations Team (CINT) and members the Emergency Services Team (EST) responded to the scene.

Peterson ultimately exited the residence on September 9, 2020, at approximately 1:14 a.m. after several hours of negotiations. Peterson was transported to the St. Mary’s County Detention and Rehabilitation Center in Leonardtown and charged with Assault Second Degree.

Anyone with information on this incident is asked to contact Deputy Bianca Salas at (301) 475-4200 extension 78160 or by email at

Citizens may remain anonymous and contact Crime Solvers at (301) 475-3333, or text a tip to “TIP239” plus their message to “CRIMES” (274637). Through the Crime Solvers Program tipsters are eligible for an award of up to $1,000 for information about a crime in St. Mary’s County that leads to an arrest or indictment.

For official news and information, follow the St. Mary’s County Sheriff’s Office on Twitter @firstsheriff.

Marcus Isaiah Peterson​

Disclaimer: In the U.S.A., all persons accused of a crime by the State are presumed to be innocent until proven guilty in a court of law. See: Additionally, all of the information provided above is solely from the perspective of the respective law enforcement agency and does not provide any direct input from the accused or persons otherwise mentioned. You can find additional information about the case by searching the Maryland Judiciary Case Search Database using the accused's name and date of birth. The database is online at . Persons named who have been found innocent or not guilty of all charges in the respective case, and/or have had the case ordered expunged by the court can have their name, age, and city redacted by following the process defined at