ARLINGTON COUNTY, Virginia —On Thursday, the Arlington County, Virginia Police Department announced the arrest of a Maryland man following a month’s long criminal investigation, according to a media release from Arlington County police.
Colin Demarco, 26, of Rockville, Maryland is charged with Attempted Murder, Criminal Solicitation to Commit Murder, Carrying a Concealed Weapon and Wearing a Mask in Public to Conceal Identity. He was taken into custody at his residence on January 16 and later extradited to the Commonwealth of Virginia. He is being held without bond in the Arlington County Detention Facility.
At approximately 3:15 p.m. on August 10, 2025, Arlington County Police were dispatched to the 3800 block of 7th Street S. for the report of a suspicious person.
A witness reported observing a suspect, who was wearing a surgical mask and rubber gloves, carrying a backpack and appeared to be concealing a firearm under his shirt, on the victim’s porch.
The suspect subsequently approached the witness and inquired about the victim before leaving the scene. The witness then contacted police and responding officers established a perimeter and canvassed the area for the suspect with negative results. The incident was captured on home surveillance video and the suspect was subsequently identified.
During the course of the investigation, the Arlington County Police Department executed search warrants for digital records associated with the suspect. As a result of these search warrants, police recovered digital evidence that the suspect had obtained directions to the victim’s residence, confirmed in court records as the home of t Office of Management and Budget Director Russell Vought.
The suspect also had information detailing locations of firearms possessed by a relative and had a guide detailing tips to prevent criminal detection.
Additionally, the suspect had posted online about the victim and had online discussions appearing to solicit others to murder the victim. Within days of these online solicitations, the August 10 incident occurred where the suspect arrived at the victim’s address wearing a mask and gloves, possibly concealing a firearm and inquired about the victim. As a result of the investigation, detectives obtained the criminal warrants for the suspect’s arrest.