Charging documents released Monday described how Kenneth Furr crashed his Cadillac into another vehicle early Friday morning, stood on the hood of the victims' vehicle and shouted, "I'm gonna kill all of you."
There were five people in the other vehicle, police said. One person suffered multiple gunshot wounds to the arm and hand, and two others were hurt in the attack.
Police said Furr, a 20-year-veteran, blew a 0.15 on an alcohol breath-test machine after the shooting -- nearly twice the legal limit for drivers in D.C.
He remains held on charges of DWI and assault with a deadly weapon. His first court appearance is scheduled for Tuesday, and he has been segregated from the other prisoners.
Furr's attorney said he could not comment about the case or Officer Furr, who police say is on paid leave.
According to charging documents, Furr got into an argument with several transgendered people outside the CVS pharmacy at 400 Massachusetts Avenue at about 4:40 a.m. Friday. He pulled a gun on one of the victims, who then reported the incident to an off-duty D.C. police officer working security at the pharmacy, charging documents said.
The CVS officer determined that Furr was an "off-duty officer, and therefore no further action was necessary," the charging document said.
The victims later saw Furr driving his Cadillac and followed him in their car, police said.
Furr got out of his vehicle, pointed the gun at the driver. The sequence of the events that followed is unclear is unclear. Patrol officers nearby said they heard the cars crash and then rapid gunfire. The victims said Furr fired first and then the cars struck.
Officers found Furr standing on the hood, pointing his off-duty service weapon at the windshield. Police recovered five shell casings that matched Furr's weapon.
A spokeswoman said she could not comment about whether police are looking to see if Furr might be connected to the two early morning shootings of transgendered people in Northeast Washington earlier this summer.
It wasn't the first time Furr has gotten into trouble.
He was arrested in 2004 for driving while intoxicated and operating while impaired, according to court records. He pleaded no contest and the charges were dropped after he completed a diversion program.
He was suspended for between 30 and 90 days in that case, according to city records.
On Christmas Day 1996, Furr and another officer were on duty when they got into a drunken argument with a mother and son. Police brass placed Furr on administrative leave and tried to fire him, but he was reinstated in 1998 after a change in police chiefs.