There is no family tort immunity in Washington.[1] Also, insurance policies that exclude coverage for injury caused by family members are unenforceable under Washington law.[2] The same is true for insurance policy exclusions of family members for UIM coverage.[3]
Because of this if there is arguably fault on the part of a family member the at-fault family member or member should not have the same attorney as the other family members.
[1] Merrick v. Sutterlin, 93 Wn.2d 411 (1980).
[2] MOE v. Wiscomb, 95 Wn.2d 373 (1980).
[3] Tissell v. Liberty Mutual Ins., 115 Wn.2d 107 (1990).<-->