Memphis police have identified a suspect responsible for the killing of a city police officer during a traffic stop on Saturday night.

Toney Armstrong, a Memphis police director, said 29-year-old Tremaine Wilbourn was the one who fatally shot 33-year-old Officer Sean Bolton. Wilbourn is currently at large and is considered armed and dangerous.

"You can be assured that we will continue to pursue this suspect, and we will exhaust all means until he is in custody," said Armstrong, according to CNN.

Wilbourn currently faces charges for first-degree murder. He had actually been on supervised released by the U.S. Western District Court for a 122-month sentence for bank robbery.

The director revealed details of the fatal encounter, in which Bolton had apparently disrupted an ongoing drug deal during which the police officer was shot multiple times and killed by a passenger in a car after "some type of physical altercation."

Bolton was in critical condition and eventually died after he was taken to a local hospital.

Armstrong added that the drug deal in question amounted to "less than two grams of marijuana," which is considered "a misdemeanor citation and a fine," according to USA Today.

The White House has contacted the department and is aware about the incident. The United States Marshals Service has also offered a $10,000 reward for anyone who can capture Wilbourn.

Bolton is the third police officer fatally shot in more than four years. Officer Martoiya Lang was killed while serving a warrant in December 2012, while Officer Tim Warren was fatally shot during a shooting at a hotel in downtown Memphis in July 2011, according to Fox News.