( April 27, 2026, 2:33 PM EDT) -- DETROIT — A reinsurer and a claims handler argue in a supplemental brief filed in Michigan federal court that a captive insurer’s claims against the nonparty claims handler in a dispute over coverage for Legionnaires’ disease claims under a reinsurance agreement fail because the complaint alleges no duty, breach or concrete injury sufficient to establish a justiciable controversy and, in any event, concern issues arising out of the agreement that must be resolved in a pending arbitration....