Police arrested 44-year-old Darrell Lattisaw, of the 200 block of V Street Northwest in the District, Thursday and charged in connection with the death of Charlene Jackson, 37, of the 4900 block of La Salle Road in Chillum.
Lattisaw allegedly assaulted Jackson Thursday in the same block as her home, police said. She died of her injuries at a nearby hospital.
Witnesses restrained Lattisaw until officers arrived, police said. Police have not determined a motive.
Police arrested 22-year-old Kraystle Shantelle Peake, of the 2000 block of Ray Leonard Road in Palmer Park, Friday and charged her with first-degree assault.
She allegedly stabbed Grafton Arthur Forde, 37, of the 2000 block of Ray Leonard Road, about 9 p.m. Friday in the same block as their homes, police said. Police have not announced a motive in the case.
After Forde died at a nearby hospital, homicide detectives got a warrant for a first-degree murder charge, police said.
Police have not made arrests or determined motives in the following two homicides:
Cardarius Kuame Rashad Becton, 16, of the 1100 block of Wahler Place Southeast in the District, was found with a gunshot wound on the ground of a parking lot in the 1900 block of Addison Road South in Capitol Heights about 7:30 p.m. Friday.
He was taken to a nearby hospital, where he died a short time later.
An unidentified man was found shot several times about 11:30 p.m. Sunday in the 5000 block of 57th Avenue in Bladensburg and pronounced dead at the scene.
Police are asking anyone with information to call the Homicide Unit at 301-772-4925. Callers wishing to remain anonymous can call Crime Solvers at 1-866-411-TIPS, and a cash reward is available for tips that lead to an arrest and indictment.