Two law firms’ fee-sharing agreement over a $9.5 million police misconduct settlement is unenforceable under Illinois Supreme Court rules, a state appeals panel ruled last week.The 1st District Appellate Court also found that a third attorney is entitled to 30% of the contingent fee because her separate referral contract was valid.After settling with the city of Chicago in federal court, a Cook County probate judge approved a 40% contingent-fee award, giving the lawyers a $3.8 million pot to split.The client in the …