A 35-year-old woman was fatally shot Wednesday night inside a residence in Southeast Washington, during what D.C. police described as a domestic dispute.

The victim was identified as Erica Ward of Southeast Washington. She was pronounced dead at a hospital.

Police said they arrested Samuel Mack, 54, of Northeast Washington, and charged him with second-degree murder while armed. Authorities did not describe the relationship between Mack and Ward.

The shooting happened about 11:35 p.m. in the 4700 block of Benning Road SE, in the Marshall Heights neighborhood. Police did not reveal the nature of the dispute.

The shooting was the District’s 198th killing of 2020, a roughly 20 percent increase over 2019.

Meanwhile, D.C. police said they have arrested suspects this week in connection with several other homicides.

On Tuesday, police said they charged Marvin Smith, 27, of Northeast Washington with first-degree murder in the Oct. 9 shooting death of Eugene Miller, 41, of Brandywine, Md.

Police said Miller was shot about 11:20 p.m. in the 2400 block of Elvans Road SE.

An arrest affidavit says one witness told police the shooting was in retaliation for a theft that occurred seven to eight years ago. Smith’s attorney with the D.C. Public Defender Service did not respond to an interview request.

Also Tuesday, police said they arrested Lewkus Turner, 26, of Upper Marlboro, Md., and charged him with second-degree murder in the Dec. 11 death of Vincent Gyamfi, 26, of Southeast Washington.

Police said Gyamfi was shot about 4:10 p.m. in the 1700 block of 29th Street SE.

An arrest affidavit says Gyamfi and Turner had been best friends but had recently argued over a social media post by Turner. Other witnesses told police there had been an argument over a robbery.

Turner’s attorney with the Public Defender Service did not respond to an interview request.

On Wednesday, police said they arrested Vincent Bigsby, 34, of Northeast, and charged him with first-degree murder in the Nov. 5 stabbing death of Vondell Hatton, 31, of Northeast Washington.

The stabbing occurred about 7:15 p.m. in the 1600 block of E Street NE. No other details have been disclosed.

Also on Wednesday, police said they arrested Steven Rodgers, 28, of Southeast Washington, and charged him with second-degree murder in the Nov. 9 death of Martez Jackson, 25, of District Heights, Md. Police said he died at a hospital on Nov. 10.

The shooting happened about 8:55 a.m. in the 1400 block of Howard Road SE. Police said Jackson was found wounded in a vehicle.

Rodgers’s attorney did not respond to an interview request.

Police said they also have arrested Rashad Winston, 24, of Southeast Washington, and charged him with first-degree murder in the Dec. 21 death of Tyree Brox, 25, of Suitland, Md.

Police said the shooting happened about 2:30 p.m. at 51st Street and Bass Place SE. Brox was found inside a vehicle and was pronounced dead at the scene.

An arrest affidavit says Brox was shot during a dispute. His attorney could not be reached on Thursday.

On Thursday, police said they arrested Deandre Levy, 19, of Gaithersburg, Md., and charged him with first-degree murder in the Aug. 10 killing of Taijhon Wyatt Jr., 17, of Northeast.

The shooting happened about 9:30 p.m. in the 5500 block of Ninth Street NW. Police did not release further information.