St. Mary's Co. Fatal Accident Under Investigation- Lexington Park

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On May 21, 2020, at 5:25 a.m. deputies from the St. Mary’s County Sheriff’s Office responded to the 21130 block of Three Notch Road in Lexington Park, for the reported motor vehicle collision. Deputies arrived on scene and located a truck and motorcycle involved in the collision. The St. Mary’s County Sheriff’s Office Collision Reconstruction Unit responded to the scene and continued the investigation.

Preliminary investigation determined a 2016 Chevrolet Colorado operated by Aaron Jacob Windsor, age 24 of Avenue, was traveling north on Three Notch Road and made a left-hand turn at the intersection with Hermanville Road. Windsor’s vehicle collided with a 2017 Indian Motorcycle travelling south bound on Three Notch Road operated by Marc Allen Guetschoff, age 61 of Lexington Park. Guetschoff was ejected from the motorcycle and pronounced deceased on the scene by emergency medical personnel.

At this time, speed, alcohol, and drug use do not appear to be factors in the collision. Anyone who witnessed the collision and has not yet provided a statement to law enforcement is asked to contact Corporal Vincent Pontorno at (301) 475-4200 extension 72337 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.

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