Detectives from the Metropolitan Police Department’s Homicide Branch are investigating a pair of double homicides in the Sixth District that occurred within three days of each other and left four people dead, including a brother and sister.

The first incident occurred about 11:39 p.m. July 17 in the 300 block of Ridge Road SE. Officers assigned to the Sixth District Patrol Support Team who were in the area heard gunshots and responded. Upon investigation, they found three men who had been shot. One man, later identified as Anthony Chase, 19, of Southeast Washington, was located in the 100 block of Ridge Road SE. He had been shot several times and emergency personnel determined that he had already died by the time they arrived. He was taken to the D.C. Medical Examiner’s office for an autopsy.

Also located at the scene was Eric Leeper, 27, of Southeast Washington, who was taken to a local hospital with serious injuries. He later died. A third man was admitted to a local hospital in stable condition. He is recovering from his injuries.

The second double-homicide occurred on July 20 in the 5300 block of East Capitol Street NE. Police who responded to a call for two people shot located a man and a woman suffering from gunshot wounds. Both were unconscious. The woman was taken to a local hospital, where she later died. The man, who was dead at the scene, was taken to the medical examiner’s office, where an autopsy was ordered.

Police identified the woman as Jamie Jenkins, 28, of Southeast. The man was identified as Jamahl Jenkins, 21 also of Southeast, police said.

A vigil for the four victims held on July 22 drew more than 100 people. Mourners included Mayor Vincent Gray and Ward 7 D.C. Councilwoman Yvette Alexander.

According to the Washington Post, relatives said Jamahl Jenkins was a new father who worked at a local restaurant and Jamie sang in a band and hoped to achieve fame as a performer.

In another incident, Walter Goode, Jr., 52, of Southeast Washington was found suffering from multiple gunshot wounds about 4:20 a.m. July 20 in the1100 block of 1st Place, NW. Authorities said he died at the scene.

No arrests had been made in any of the cases. The Metropolitan Police Department has offered a $25,000 reward to anyone who provides information which leads to the arrest and conviction of the person or persons responsible for any of the slayings. Anyone with information is asked to call the police at (202) 727-9099. Anonymous information may be submitted to the department’s TEXT TIP LINE by text messaging 50411.