NEW HAVEN, Conn. – A former Transportation Security Administration officer admitted his role Tuesday in a painkiller trafficking ring, becoming the fourth law enforcement officer to plead guilty in the case.

Jonathan Best, 30, of Port St. Lucie, Fla., pleaded guilty in New Haven to conspiracy to distribute and to possess with intent to distribute oxycodone, according to the U.S. attorney’s office. Authorities say Best accepted cash in exchange for facilitating the transportation of illegal narcotics through airport security without detection.

Prosecutors say Best also agreed last year to travel to Connecticut to help the narcotics trafficker launder drug proceeds.

“This defendant received cash payments to position himself at airport security while large quantities of oxycodone pills were smuggled through, and he also traveled from Florida to Connecticut to help this narcotics trafficking enterprise launder illegal proceeds,” U.S. Attorney David Fein said. “He breached his oath of public office and the serious responsibilities entrusted to him.”

Best accepted $2,500 from the trafficker, who was cooperating with authorities, and $1,000 from an undercover law enforcement officer, prosecutors said. He allowed the trafficker to pass through security at Palm Beach International Airport in Florida with thousands of oxycodone pills that Best believed were intended for distribution in Connecticut, prosecutors said.

Best’s attorney declined to comment.

Best faces up to 20 years in prison when he is sentenced July 12.

Another former TSA officer, a former New York police officer and a former Florida state trooper have already pleaded guilty in the case.