Potomac, Maryland – A medication technician at a senior living facility in Montgomery County has been charged with first-degree murder in the death of an 87-year-old resident, and separately accused of attempting to kill a Maryland State Police trooper during a traffic stop. Authorities say forensic evidence and surveillance footage helped connect the two violent incidents.
The suspect, Maurquise Emillo James, 22, of Baltimore, is currently being held without bond as investigators continue to piece together the events that unfolded over several days.
Incident Overview
Police say Robert Fuller Jr., 87, was found dead inside his apartment at the Cogir of Potomac senior living facility on February 14. He had suffered a gunshot wound to the head, according to investigators.
James, who worked as a medication technician at the facility since October 2025, is accused of killing Fuller. In addition to the murder charge, he faces attempted first-degree murder, felony assault, and use of a firearm in a crime of violence in connection with a separate shooting involving a state trooper.
Authorities described Fuller as a former lawyer and philanthropist who helped establish a transitional housing facility in Maine for women veterans. Nothing appeared to have been stolen from his apartment.
Timeline of Events
Montgomery County police were called to the senior living facility in the 10800 block of Potomac Tennis Lane at approximately 7:30 a.m. on Valentine’s Day for what was initially reported as a medical emergency. Officers discovered Fuller deceased inside the apartment he shared with a roommate.
According to charging documents, James had administered medication to Fuller and his roommate on February 13, as part of his normal duties. Investigators say he later returned to ask the roommate whether the Oxycodone had taken effect, behavior that was described as unusual.
Hours later, at around 3:30 a.m. Tuesday, a Maryland State Police trooper attempted to stop James’ Infiniti sedan in Baltimore. Police say that when the trooper approached the driver’s side door at a stop sign, James opened the door and fired two shots before fleeing the scene.
The trooper was wounded but did not return fire. He was treated at a hospital and later released.
Approximately 12 hours after the traffic stop, James was arrested in Montgomery County.
Evidence Linking the Cases
Investigators say ballistic testing confirmed that a bullet casing recovered from Fuller’s apartment matched the same firearm used in the shooting of the trooper.
Montgomery County Police Chief Marc Yamada addressed the connection between the two cases.
“Investigators from Montgomery County and the Maryland State Police, along with the U.S. Marshals, began actively working together and eventually determined that the cases were definitely connected and the suspect was probably the same in both cases.”
Detectives also recovered discarded paper towels, multiple wigs, a mask, and additional bullet casings, which they believe link the suspect to the crime scenes.
Surveillance Footage and Disguise
Surveillance video captured a person approaching a side entrance of the facility on the night of the killing. The individual appeared to have long dark hair and was wearing a mask. Authorities later determined the hair was likely a wig.
Montgomery County Police Capt. Sean Gagen commented on the disguise.
“At the time, we had no idea that that was a wig. Some people thought that could have been a part of a disguise.”
Employees told investigators that James had previously worn a similar plaid jacket seen in the footage while at work.
Searches conducted at residences linked to James uncovered multiple wigs and a mask.
Door Tampering Raises Concerns
Investigators believe a side entrance door may have been intentionally tampered with before and after the homicide.
A sensor on the door was reportedly not working the night of the killing. Charging documents state that James was the last person to trigger the sensor on January 9, before its battery was apparently removed. The sensor was reset following the homicide.
More than a week later, another employee alerted authorities after observing unusual behavior involving the same door. Police say a paper towel and napkin were used to prop the door open, and the battery had been reversed so the alarm would not function.
Gagen acknowledged concerns that additional harm might have been prevented.
“I truly do feel that we headed something nefarious off.”
Motive Remains Unclear
Officials said during a news conference that the motive behind Fuller’s killing remains unknown.
Montgomery County State’s Attorney John McCarthy confirmed that James, who lives in Baltimore and has ties to White Marsh and other communities, will first face trial in Montgomery County for the homicide before being transferred to Baltimore for proceedings related to the trooper shooting.
A bond review hearing is scheduled for Thursday.
Community and Safety Impact
The case has deeply shaken residents and families connected to the senior living facility. Police emphasized that there is no ongoing threat to residents or staff, and facility administrators have cooperated fully with the investigation.
Incidents involving trusted caregivers can be especially distressing for families. Authorities encourage staff and residents in assisted living environments to report suspicious or unusual behavior immediately to supervisors or law enforcement.
Conclusion
The arrest of a caregiver charged with killing an elderly resident and allegedly shooting a state trooper has raised serious concerns about safety and trust within assisted living communities. As the legal process moves forward, investigators continue working to determine the motive behind the violent acts.
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