An off-duty officer with the Metropolitan Police Department in Washington D.C. was killed in Baltimore, making him the city’s 301st homicide victim.

Sgt. Anthony Mason Jr, 40, was killed when someone opened fire on the car he was sitting in with a 43- year old female in the early hours of Nov 4. The woman identified herself to police as Mason’s girlfriend.

Mason was gunned down during the Baltimore Ceasefire Weekend, which called for no homicides in the city for 72 hours, Nov. 3 to Nov. 5. Mason’s death was the only homicide during the 72 hour period.

According to the Baltimore Police Department (BPD), Mason was found with multiple gunshot wounds in the upper body in the 2800 block of Elgin Avenue in West Baltimore around 12:45 a.m.

Mason’s companion was shot in the leg and is expected to survive. The suspect fled the scene.

Mason, a father of three, served in the U.S. Army as a police officer for five years, before joining the Metropolitan Police Department as a Sergeant according to his cousin, James Grayton.

According to the family, Mason was a Washington native, but moved to Baltimore and commuted to work in Northeast Washington.

Mason had been with MPD for 17 years and served as an undercover officer in the 6th district in D.C.

Sgt. Tony Anthony Mason Jr. (Police Dept Photo via Twitter)

“He was a good father, a great person, loved people. Loved having fun,” Grayton told the AFRO. “Right now it’s a tragedy in our family and we are just trying to hold it together for the kids.”

Family and friends gathered at Mason’s childhood home in Northeast Washington waiting for answers from police.

“He was in his neighborhood. We don’t know any details, (we) just know he was close to his house that was it, said Grayton. “It’s just hard to figure out why he would lose his life in this way.”

According to MPD, Mason was on non-contact status from the department because of an internal investigation, meaning he was assigned to administrative duties.

D.C. police have not provided any information on the internal investigation except stating that it was a “personnel matter.”

Anyone with information is asked to call detectives at 410-396-2100 or Metro Crime Stoppers at 1-866-7LOCKUP.

If you wish to remain anonymous, you can also text tips to 443-902-4824.