MURDER USA: Gregory Arnold Sr. killed his father Stephen Arnold, mother critical; shot and killed self in the standoff with police at a barricade in Budd’s Creek

Dad Dead, Mom Critical; Son Shot Self and Died

Killer had a long record of burglary, domestic violence, illegal gun possession and assault that resulted in easy plea deals

UPDATE: St. Mary’s County Sheriff Tim Cameron reports that on September 1, 2020, during a family dispute, the suspect later identified as Gregory Wayne Arnold Sr., 48 of Callaway, shot the two victims multiple times at a residence located at 22999 Newtowne Neck Road in Leonardtown, Maryland.

Stephen Edward Arnold, 72, of Leonardtown, was transported to an area trauma center for treatment, and ultimately succumbed to the injuries sustained in the shooting. Rosalea Denise Arnold, 66 of Leonardtown, was transported to an area trauma center for treatment and remains in critical condition.

Arnold was observed by deputies shortly after the shooting operating a vehicle on Route 5 in Mechanicsville, and a vehicle pursuit ensued. The vehicle pursuit continued into Charles County, and then back into St. Mary’s County, where Arnold stopped the vehicle in the roadway on Route 234 near the intersection of Route 236.

Son was armed with two handguns; killed self as barricade intensified

Arnold, who was armed with two handguns, refused to exit the vehicle and a barricade was declared. Members of the Critical Incident Negotiations Team (CINT), and members of the Emergency Services Team (EST) responded to the scene and negotiators from CINT began negotiating with Arnold in attempt to peacefully resolve the barricade. Arnold Sr. ultimately sustained a self-inflicted gunshot wound and was transported to an area trauma center for treatment, where he later succumbed to his injuries.

Gregory Wayne Arnold Sr., of Lot B-5, Take It Easy Ranch Road, Callaway, Md., was set to face malicious destruction of property charges on Sept. 3, 2020, in St. Mary’s County District Court. The charges were filed by the St. Mary’s States Attorney on behalf of Bruce Chainay. The charges were linked to an incident that took place on April 6, 2020.  

Gregory Wayne Arnold had previously lived in an apartment at his parent’s residence as recently as February 7, 2020, when he filed a civil suit against an insurance company.

A peace bond ordering Gregory Arnold to stay away from a victim, their residence, and workplace was issued on April 18, 2020, marked final on June 23, 2020, and is valid through Oct. 16, 2020.

Assault charges against Gregory Wayne Arnold Jr., (DOB 09/12/1994) were filed on Dec. 31, 2015, in District Court for St. Mary’s by Maryland State Trooper Geyer.  The charges were dropped by St. Mary’s States Attorney Richard Fritz on March 31, 2016.

A domestic violence case filed against Gregory Wayne Arnold Sr., (DOB 05/24/1972) on September 10, 2012 in St. Mary’s County Circuit Court. 


On February 17, 2011, Gregory Wayne Arnold Sr. entered a guilty plea to illegal possession of a regulated firearm and reckless endangerment in a plea deal with States Attorney Fritz in St. Mary’s County Circuit Court. THE DEAL: Arnold was sentenced to four years and six months in prison, but the deal allowed for all but one year and six months to be suspended which allowed for the time to be spent in the St. Mary’s County Jail. A felony assault charge was dropped by Fritz as part of the plea deal.  

When serving time in the St. Mary’s Jail, Gregory Arnold Sr. assaulted a correctional officer and the charge was put on the Stet Docket by Fritz on March 16, 2011.

Prior charges of burglary were filed in both Calvert and Charles counties against the now deceased gunman who shot his parents, killing his father, before taking his own life.

LEONARDTOWN, MD. – St. Mary’s Sheriff Tim Cameron reports that on September 1, 2020, at approximately 1:15 p.m. deputies from the St. Mary’s County Sheriff’s Office responded to the 22900 block of Newtowne Neck Road in Leonardtown, for the reported shooting.

Deputies arrived on the scene and discovered two victims had sustained multiple gunshot wounds. Both victims, a male age 72 and a female age 66, of Leonardtown, were transported to area trauma centers for the treatment of the injuries sustained.

Trooper Medic on the Maryland State Police helicopter closes the door on Trooper Seven after loading a patient. THE CHESAPEAKE TODAY photo

A male suspect, age 48 of Callaway, was identified and located by deputies operating a vehicle northbound on Route 5 in Budds Creek, Md.. A vehicle pursuit ensued and the Charles County Sheriff’s Office and Maryland State Police responded and assisted in the vehicle pursuit. The suspect stopped his vehicle in the roadway in the area of Route 234 and Route 236 in Budds Creek. The armed suspect refused to exit the vehicle, and a barricade was declared.

Sheriff Cameron says that the suspect ultimately sustained a self-inflicted gunshot wound and was transported via helicopter to an area trauma center for treatment.


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