COLLEGE PARK, Ga. -- Former College Park Police Officer Gary Clements tested positive for having cocaine in his system when he backed into another car while transporting two prisoners, according to investigators.

After the accident, the officer had to take a drug test.

"After the drug test, it came back positive for cocaine," said Interim College Park Chief Ron Fears.

Police said Clements told them he had the drug in his system after he tested the drug by tasting it after he pursued suspects who got away.

"He did some of the old type of testing. He tested with his finger," said Fears.

Clements resigned, in lieu of termination.

The city of College Park is investigating why its police department allowed the officer suspected to resign instead of being terminated.

Channel 2 Action News reporter Tom Jones confronted Fears about why he allowed the officer to resign and why he's not face charges after the officer tested positive for cocaine.

"At this point, there are no charges pending," said Fears. "But why not, Chief? This is serious. He's a police officer driving with drugs in his system. You know it. You have the results. And there is no charges," said Jones. "Not at this time, sir," Fears said.

College Park Mayor Jack Longino is upset over the incident.

"If he had drugs in his system, he will not be allowed to resign. He will be fired! And I want him charged with driving under the influence!" said Longino.

When Jones talked to Clements about the incident, he was told to talk to City Hall.