FORT MYERS, Fla. --Rep. Trey Radel, R-Fla., pleaded guilty Wednesday to possession of cocaine and was sentenced to one-year of supervised probation.

"I've hit a bottom," Radel said, as he appeared in District of Columbia Superior Court.

The freshman congressman, who represents a solidly Republican district in southwest Florida, said he'll enter an in-patient rehab program in his home state.

Radel was caught buying drugs in what a senior Drug Enforcement Administration official described as a sting operation that was part of an investigation by several federal agencies into a drug ring in the nation's capital. A drug dealer who told law enforcement officials that one of his customers was a member of Congress helped set up a buy on Oct. 29 and Radel bought the cocaine, the official said.

The DEA official was not authorized to speak publicly about the case.

The charge is a misdemeanor. Radel was also fined $250, which will be paid to a victims' compensation fund.

The arrest of Radel, who was elected last year in a solidly Republican district in the Fort Myers-Naples area, rocked Congress and Southwest Florida. The congressman's arrest comes as Toronto Mayor Rob Ford has been stripped of his powers by the City Council for smoking crack, drinking and boorish behavior.

Radel, 37, issued a statement Tuesday expressing remorse, explaining that he struggles with alcoholism and that his arrest gives him the opportunity to seek treatment and counseling.

"This led to an extremely irresponsible choice," Radel said in his statement. "Believe me, I am disappointed in myself, and I stand ready to face the consequences of my actions."

On Radel's Facebook page Tuesday night, there were posts that were both supportive and angry. While some people gave him credit for taking responsibility for his actions, others blasted him for his behavior.