A suspect has been charged in the killings of a brother and sister this summer, D.C. police said Monday.

Police said a Superior Court warrant has been issued charging Kevin Antione Walker, 38, with first-degree murder while armed.

Walker is being sought in connection with the killings of Jamahl Jenkins, 21, and Jamie Jenkins, 28, police said. Police said both were found fatally shot in the 5300 block of East Capitol Street NE on July 20.

Jamie Jenkins had been singing with her R&B band shortly before she was shot, according to family members. As she got out of a car, they said, someone grabbed her bag.

About 3 a.m., family members said, she called her brother for help, and he went to meet her.

In July, police said they did not know whether the shooting was linked to the theft. They said they thought the two were walking to a friend’s house when they were killed.

Police found them after being called to East Capitol Street about 4:35 a.m. in response to a report about a shooting.