A Cook County commissioner quits as a former city administrator faces a bribery charge. Both played roles in the rise of red-light cameras and vendor SafeSpeed.

The once-powerful state officeholder previously resigned as chairman of the influential Illinois Senate Transportation Committee in October.

State Sen. Martin Sandoval has resigned as chairman of the powerful Illinois Senate Transportation Committee, weeks after federal authorities raided Sandoval’s home and offices as part of an ongoing corruption probe.

Federal raids on the home and offices of state Sen. Martin Sandoval were followed by raids on several suburban village offices in his senate district. Sandoval and at least three others being investigated are connected to a red-light camera company, which has denied wrongdoing.

Federal agents raided the offices of three suburban villages, including one governed by a mayor who doubles as a Cook County commissioner. All three are in the district of state Sen. Martin Sandoval, also the subject of a federal raid.