?Riddle?s criminal trial illustrated how Ms. Conyers and Riddle used her office to pressure persons with business before the city to furnish items of value to Conyers and Riddle,? states Conyers? sentencing document.

Download:Conyers Criminal Charging Document 6/26/09

According to charging documents against Conyers, "Beginning on a date unknown and continuing until in or about December 2007, in the Eastern District of Michigan, Monica Ann Conyers did knowingly and voluntarily conspire and agree with an aide and others to corruptly solicit and demand for the benefit of herself and others, and to accept and agree to accept, things of value from persons while an agent of the City of Detroit."

The document states that on Nov. 20, 2007, Conyers "met an individual sent by Rayford Jackson in the parking lot of the Butzel Family Center in Detroit and received an envelope containing cash."

It also states that on Dec. 4, 2007, Conyers and her aide accepted an ?envelope containing cash" in a Detroit McDonald's parking lot.

Riddle was identified as Conyers aide.

Conyers is the biggest catch so far in the FBI's wide-ranging investigation of corruption in Detroit city government. Nine people have pleaded guilty, including two former directors of the downtown convention center, and prosecutors have promised that more charges are coming.

Two people who worked for Synagro have already pleaded guilty: Rayford Jackson and James Rosendall Jr.

Jackson pleaded guilty June 15, 2009, to arranging four bribes in 2007 that totaled more than $6,000. He was sentenced to five years in prison.

Rosendall pleaded guilty last year, accused of trying to influence city officials by chartering private planes to take them to Las Vegas and Mackinac Island, donating about $200,000 to campaign entities of a city official and paying $25,000 to an unidentified city official's relative. He was sentenced to 11 months in prison.

The city of Detroit and Synagro Technologies called off the million-dollar contract after the corruption investigation began.

Homrich Inc. took over the new contract on Feb. 3, 2009.