(May 16, 2018, 5:00 PM EDT) -- TACOMA, Wash. — An insurer acted in bad faith in using an age deterioration formula in estimating depreciation for personal items damaged in a house fire that were covered under a homeowners insurance policy because the formula failed to consider physical deterioration and obsolescence, a federal judge in Washington ruled May 10 in granting in part an insured’s summary judgment motion and denying the insurer’s motion for summary judgment in its entirety (Tom Sparks v. American Family Mutual Insurance Co., No. 18-5038, W.D. Wash., 2018 U.S. Dist. LEXIS 79249)....