Police say Gwinnett County police officer Antwan Toney was rushed in critical condition to Gwinnett Medical Center, where he died. Maynard is still at large.
A second suspect, 19-year-old Isaiah Pretlow, faces an aggravated assault charge related to an incident following the fatal shooting.
Police say both men are suspected in the fatal shooting of 30-year-old Officer Antwan Toney, who was shot while responding to a suspicious vehicle parked near a middle school in the Snellville area. The caller believed the vehicle occupants might have been smoking marijuana.
The suspects fired through the vehicle's window before driving off, police say.
At least one shot came through the glass and struck the officer. Initially, authorities were searching for four suspects, but that number was dwindled down to two, police said upon announcing Pretlow's arrest.
"They fled the scene and crashed without an officer in hot pursuit", Smith said.
A Georgia police officer has been fatally shot while responding to a suspicious vehicle parked near a middle school.
Maynard is charged with aggravated assault and murder, authorities said in a news conference. Pretlow was not hit and fled into a wooded area.
This is the fifth death the Gwinnett County Police Department has experienced in the line of duty.
Toney, who was originally from Southern California, had been with the department for nearly three years. "There are no other descriptions available at this time", the news release said, adding that anyone with tips could call the police at (770) 513-5100.
His Gwinnett colleagues "recall a very jovial person who was dedicated to his job and dedicated to his community", Ayers said.
The Gwinnett Police Department noted on twitter that this was Officer Toney's first job as a police officer and that his family is from California.