When cops found the driver, they smelled PCP and believed he was under the influence, said Cotterman.
Green, who was suspected to be under the influence of PCP at the time, was removed from this vehicle, handcuffed and placed in the front seat of the police cruiser while Owen and another officer waited for a drug recognition expert, police said. It was a swiftness that Prince George's Police Chief Hank Stawinski acknowledged when addressing the media to announce the charges on Tuesday.
Owen is charged with second degree murder, voluntary and involuntary manslaughter, first degree assault and use of a firearm in the commission of a crime of violence.
The fateful encounter between Green and Owen came after 911 calls made surrounding a driver hitting multiple vehicles, prompting police to pull Green over in the town of Temple Hills.
The victim was identified as William Howard Green, 43, of Washington, D.C. Authorities did not reveal Green's race, citing department policy.
Officers performed lifesaving measures and took the man to a hospital.
Green was handcuffed and placed in the front seat of the police vehicle while officers waited for a drug recognition expert to identify a substance that was removed from his auto.
"There are no circumstances under in which this outcome is acceptable and I want to extend my heartfelt sorrow and sympathies to the Green family", Stawinski said Tuesday. The suspect had been shot multiple times by the officer's weapon.
"We are determined to find out what happened inside that cruiser", Cotterman said.
The shooting wasn't caught on body-camera video because the officer didn't have one.
Stawinski explained that seating individuals in the front seat of police cruisers gives officers better control of the person, and has been a practice in the department for years. Investigators were looking for surveillance cameras in the area that may have recorded the shooting.
Owen, a 10-year veteran of the police department, was involved in another shooting in 2011, Stawinski said. Owen was placed on administrative leave after that incident, but there is no indication whether additional action was taken.
Prince George's County State's Attorney Aisha Braveboy said in a statement Tuesday that her office will conduct a "thorough and independent investigation".
Deborah Jeon, legal director for the American Civil Liberties Union of Maryland, condemned the shooting and made a call for full transparency and accountability in the investigation. "Anything short of that assessment would just demonstrate complete lack of respect for human life", Jeon said in a statement.
Prince George's Police Cpl.
Again, police said they are investigating to piece together what unfolded.