This story was updated at 10:32 a.m. April 23, 2013.
The stepson of an off-duty Washington, D.C., police officer is being sought in connection with the officer’s death, Prince George’s County police said.
Police announced Tuesday morning that they obtained an arrest warrant for Antwan Rayvon James, 27, of Upper Marlboro in connection with the slaying Monday of 24-year Metropolitan Police Department veteran Joseph Burrough Newell, 46, of Upper Marlboro.
Police said in a statement that James is Newell’s stepson.
Police said around 9 p.m. in the 6700 block of Green Moss Drive in Upper Marlboro, officers responded to a call for a shooting.
Officer First Class Nicole Hubbard, a county police spokeswoman, said when officers arrived, investigators found that Newell had been shot and killed, allegedly by a family member.
Police initially believed the suspect may have still been inside the residence so officers established a barricade situation and brought in negotiators, Hubbard said. The barricade situation lasted for several hours, Hubbard said, until officers discovered the suspect was not in the house.
Prince George’s police are now searching for James and said in a statement that they are employing K-9 units and “other specialized teams” in the search.