More names have been added to the already lengthy roster of state officials charged in the FBI s sweeping investigation into pay-to-play politics in Pennsylvania.

On Wednesday afternoon, federal prosecutors unsealed extortion and bribery charges against Allentown Mayor Ed Pawlowski, along with charges implicating Allentown lawyer Scott Allinson and Lehigh Valley consultant James Hickey in an alleged scheme in which Pawlowski would award city contracts in exchange for campaign contributions.

The over 50 charges against Pawlowski include counts of mail fraud, wire fraud, bribery, extortion and honest services fraud.

Allinson, a member of Norris McLaughlin & Marcus, is accused of attempting to use campaign contributions to Pawlowski to steer more city work to the firm.

Additionally, Reading Mayor Vaughn Spencer, Hickey, and one-time magisterial district judge candidate Rebecca Acosta, wife of former Reading City Council president Francisco Acosta, were indicted in the pay-to-play investigation. Francisco Acosta pleaded guilty in 2015 to accepting bribes in exchange for agreeing to orchestrate a repeal of certain local ethics laws.

Rebecca Acosta is accused of using her official position as the president of the Reading School District Board of Directors to obtain a confidential bid for an energy savings contract by a competitor of a company for which Hickey acted as an agent. In exchange for that information, according to prosecutors, Hickey promised his company would contribute to Rebecca Acosta's MDJ campaign.

Last month, former state treasurer from 1997 to 2005, Barbara Hafer, pleaded guilty to lying to federal authorities about the $675,000 in consulting fees she received from Chester County businessman Richard Ireland, who was himself charged for allegedly making covert campaign donations to indicted ex-state treasurer Rob McCord.

Prosecutors accused Ireland of paying off McCord in exchange for McCord s decision to invest millions in state money into Ireland s businesses. Ireland was acquitted mid-trial in March, however.

McCord, treasurer from 2009 to 2015, pleaded guilty in February to extortion charges related to his attempts to secure campaign contributions for his failed 2014 gubernatorial bid. He awaits sentencing.

On April 29, 2016, the federal investigation also netted John Estey, an ex-chief of staff to former Gov. Ed Rendell. Estey was charged with using a lobbying firm as a pass-through for campaign donations to state politicians. He pleaded guilty in May 2016 and was sentenced in April to one year of probation.