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The Michigan Department of Environmental Quality is investigating whether a shoe manufacturer is responsible for water contamination in West Michigan.

In the 1960s, Wolverine Worldwide used a licensed dump site near Rockford to get rid of waste from its leather tanning process. Two chemicals used in the process, PFOS and PFOA, are now showing up in nearby residential wells.

A former chief of staff to Detroit City Councilman Ken Cockrel has been indicted in connection with a sludge-hauling scandal in Detroit.

John Clark resigned as Cockrel’s chief of staff in 2008, shortly after allegations came to light that he accepted $3,000 in bribes from a man who worked for Synagro Technologies. At the time, Synagro was trying to secure a sludge-hauling contract with the city worth $1.2 billion.

The man who allegedly bribed Clark, James Rosendall, was sentenced to 11 months in prison in 2009. Former city councilwoman Monica Conyers, and consultants Sam Riddle and Rayford Jackson have also been indicted in connection with the Synagro contract.

John Clark faces up to 10 years in prison for each of the two bribery counts he’s charged with in the indictment. He faces up to five years on two counts of lying to the FBI about the bribes.