TOPSHAM, Maine — The Maine Drug Enforcement Agency on Wednesday charged three people with selling oxycodone pills in connection with a distribution ring based in Waldo County.

Gary Stevens, 30, of Lynn, Mass., was arrested Wednesday morning at a parking lot near Interstate 295 in Topsham after he attempted to sell 320 30-milligram oxycodone pills to drug enforcement agents, according to a release from MDEA Cmdr. Scott Pelletier.

The estimated street value of the pills is $15,000.

On Saturday, MDEA agents and officers from the Waldo County Sheriff’s Office and Belfast Police Department arrested Arthur Gardiner Sr., 63, and Shelby Tapley, 18, both of Swanville. The two were allegedly found in possession of 129 hydrocodone pills, 17 oxycodone pills, and 91 clonazepam and Klonopin pills.

Gardiner and Tapley were charged with unlawful possession of a scheduled drug. Gardiner was also charged with violation of bail conditions.

Both remained in Waldo County Jail on Wednesday. Tapley was held on $250 cash bail, and Gardiner was held on no bail.

Stevens was charged with aggravated trafficking in Schedule W drugs and taken to Two Bridges Regional Jail in Wiscasset.

The arrests come after a five-month investigation into the illegal distribution of prescription pills in Waldo County, Pelletier said.

Agents continue to investigate where Gardiner and Tapley obtained the oxycodone, Pelletier said.