Washington DC city employee, Nikiesha Thomas, 33, of Olney, Maryland, was sitting in her car on Thursday morning when a man ran up to the parked vehicle and fired shot at Thomas

The shooting occurred in the parking lot outside the Planet Fitness in the 3200 block of Pennsylvania Avenue SE, Washington DC

After the shooting Thomas dead the alleged shooter, identified as 36-year-old Antoine Oliver of Fort Washington, Maryland, fled to Largo in Prince George’s County where he carjacked someone before returning to SE Washington DC

Oliver fled the scene and stole a car before he shot himself sitting in the vehicle, as police closed in

Detectives said the homicide was domestic in nature – media reports suggest Oliver and Thomas had been in a relationship

A woman died after she was shot outside a gym in Southeast D.C. Thursday morning, police say. Her suspected killer carjacked someone in Maryland and took his own life as D.C. police closed in on him within hours, police said. 
Nikiesha Thomas, 33, of Olney, Maryland, was found in a car in the 3200 block of Pennsylvania Avenue SE, outside Planet Fitness. 
After the shooting Thomas dead the alleged shooter, identified as 36-year-old Antoine Oliver of Fort Washington, Maryland, fled to Prince George’s County where he carjacked someone before returning to SE Washington DC.
Oliver shot himself while sitting in the vehicle as police surrounded him, police said. 
Officers were called to Planet Fitness parking lot at about 9:30 a.m. after reports of a shooting, police said.
“A single male from a vehicle ran up to that vehicle, fired at least one shot into the vehicle, striking a female,” Cmdr. John Haines told News4. 
Witnesses who declined to go on camera said they heard a loud bang and the screech of tires. 
Thomas who works in the office of the State Superintendent of Education, was taken to a hospital, where she was pronounced dead. It was unclear whether she had gone to the gym or was headed there. 

Prince George’s County police were called at about 12:30 p.m. for a report of a carjacking in the 1400 block of McCormick Drive in Largo, police said. Officers spotted the stolen vehicle, a maroon SUV, minutes later. It was headed toward D.C. 
Officers began following the SUV. Police stopped the driver at East Capitol Street and Minnesota Avenue in Northeast D.C., about seven miles from the scene of the carjacking. 
Oliver shot himself as officers approached the SUV, police said. He was taken to a hospital via helicopter and pronounced dead. 
A white sedan with a bullet hole through the driver’s side window could be seen outside the Planet Fitness. It had heavy damage to the front end. It was unclear if the car was damaged before or after the shooting. Some other cars in the parking lot were damaged; one needed to be towed.
The gym was filled with people working out at the time of the shooting. Music might have muffled the sound of gunfire. Two people said they saw emergency vehicles in the parking lot but had no idea someone had been killed.
Thomas worked for the D.C. Office of the State Superintendent of Education’s Strong Start DC Early Intervention Program, which provides “services for infants and toddlers with disabilities and developmental delays and their families.”
Detectives said the homicide was domestic in nature, and media reports suggest Oliver and Thomas had been in a relationship.