Lansing — The Michigan Supreme Court will decide in the coming months whether to overturn nearly two decades of precedent to clear the way for an attorney general investigation into insulin pricing in Michigan.

The seven justices listened to about an hour of oral arguments Wednesday morning over whether Attorney General Dana Nessel's four-year investigation into pharmaceutical giant Eli Lilly & Co.'s insulin pricing should be allowed to continue, even if it requires the overturning case law that currently bars her from investigating the issue.

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