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Three Suspects Charged in September 2020 Montgomery Village Homicide

For Immediate Release: Monday, March 22, 2021

Detectives from the Major Crimes Division have arrested and charged Anthony Thompson, age 45, of an unconfirmed address, for the September 6, 2020, first-degree murder of 37-year-old Mark Earl Leonard Webb.  Thompson was also charged with one count of conspiracy to commit armed robbery.  Detectives have also charged Trireese Chance, age 39, of the 2800 block of Schutt Road in Burkeville, Virginia, with being an accessory after the fact to Webb’s murder.  A third suspect, Larry Donnell Armwood, age 45, of the 12800 block of Cross Ridge Way in Germantown, was charged with one count of armed robbery and one count of conspiracy to commit armed robbery related to Webb’s murder.

At approximately 5:49 a.m. on September 6, 2020, a 6th District officer was investigating an unrelated call for service when he located Webb lying face down in an apartment complex parking lot located in the 9300 block of Willow Creek Drive.  Webb appeared to be suffering from a gunshot wound.  Webb was declared deceased at the scene.  Webb’s murder was later ruled a homicide by gunshot wound.

During the investigation, detectives learned that Thompson and Webb were known to one another.  Investigators developed Thompson as the suspect who committed the murder.  They also determined that Armwood was present during the murder and stole property from Webb.  After Thompson murdered Webb, Chance accompanied Thompson when Thompson disposed of the handgun.  

On March 16, Armwood was arrested on the strength of a Montgomery County arrest warrant and is being held without bond.  

Thompson, who was already incarcerated at the Montgomery County Detention Center on unrelated charges, was served with an arrest warrant that charged him with Webb’s murder.  Chance, who was already incarcerated in Virginia on unrelated charges, was served with a Montgomery County arrest warrant for his involvement in Webb’s murder.

This investigation was a coordinated effort between investigative units within the Montgomery County Department of Police detectives under the Maryland Criminal Intelligence Network (MCIN).  The Governor’s Office of Crime Prevention, Youth, and Victim Services provides grant funding and strategic support to MCIN member sites to identify, disrupt, and dismantle criminal organizations through inter-agency collaboration and data sharing to make Maryland safer.

The Governor’s Office of Crime Prevention, Youth, and Victim Services funded this project under sub-award number, MCIN-2021-0014. All points of view in this document are those of the author and do not necessarily represent the official position of any Maryland State office or agency.

3/22/2021- Release updated with Thompson's correct photo.



Anthony ThompsonAnthony Thompson (Original Image)

Trireese ChanceTrireese Chance (Original Image)

Larry Donnell ArmwoodLarry Donnell Armwood (Original Image)



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Release ID: 21-110
Media Contact: Officer Rick Goodale 
Categories: homicide