HIGHLAND PARK, MI -- A third Highland Park police officer accused in a series of incidents involving bribery and cocaine delivery pleaded guilty Thursday, according to the U.S. Attorney's office.

Anthony Bynum, 29, faces up to five years in prison and a fine of up to $250,000 after pleading guilty to conspiring to take bribes and commit extortion, according to court records. (View document .)

Two other involved officers, Craig Clayton, 55, and Shawn Williams, 33, have also pleaded guilty to extortion conspiracy.

A fourth officer, Price Montgomery, 38, is due in federal court for a preliminary examination June 7.

A wired FBI informant helped authorities gather evidence against the group after Highland Park Police Chief Kevin Coney initiated the investigation, according to federal authorities.

After arresting a man on a firearm offense in August 2012, Bynum and Montgomery, according to the criminal complaint against them, beat the suspect, and later, after the man became an informant for the FBI, were caught on camera accepting $10,000 from him in exchange for not showing up at trial.

Bynum and Montgomery are also accused of delivering what they believed to be 2 kilograms of cocaine from Oakland Mall in Troy to a location in Taylor in November 2012 for the same man, in exchange for $1,500 each.

They then recruited Williams and Clayton to help with a second delivery, carried out on Jan.23, of 4 kilograms of fake cocaine, federal investigators alleged.

The FBI estimates 1 kilogram of cocaine to be worth about $40,000 in Detroit.

"Police officers who swear an oath to serve and protect must be held to the highest standards of ethics and integrity," said FBI Special Agent in Charge Foley in a news release. "The FBI is committed to ensuring those standards are maintained."

Follow Khalil AlHajal on Twitter @DetroitKhalil or on Facebook at Detroit Khalil. He can be reached at kalhajal@mlive.com or 313-643-0527.