PORTLAND — A former state and national “enforcer” in the Outlaws motorcycle club pleaded guilty this morning to federal conspiracy charges in connection with the near-fatal shooting of a rival club member in central Maine last fall.

The plea hearing for Michael “Madman” Pedini took place in U.S. District Court in Portland.

Pedini, 39, of Madison, is charged with racketeering and conspiracy to commit violence in aid of racketeering. He would face up to 20 years in prison if he is convicted.

Prosecutors say Pedini and another member of the Outlaws, Thomas “Tomcat” Mayne, shot and seriously injured a Hells Angels member on Oct. 8, 2009, outside a Hells Angels clubhouse in the Somerset County town of Canaan.

Pedini and Mayne were allegedly following orders given to them personally by national Outlaws President Jack “Milwaukee Jack” Rosga, according to a summary of the case filed in court by Wolff.

Pedini and Mayne were among 27 members of the Outlaws from around the country who were indicted in June by a federal grand jury in Virginia.

The indictment was the result of a sprawling two-year undercover investigation of the motorcycle club by federal, state and local law enforcement agencies. It alleges that the Outlaws used a complex chain of command to commit crimes ranging from illegal gambling to drug trafficking to murder.

Mayne, 58, of Old Orchard Beach, was shot and killed at his home June 15 after agents from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives showed up to arrest him.