Washington authorities raided a storage unit belonging to Josh Powell . A ` ` presumptive test '' of a bag found inside the unit detected DNA . Powell 's wife has been missing since December 2012 . Police believe Josh Powell killed his two sons and himself last year .
Washington authorities search a storage unit belonging to Josh Powell . A `` presumptive test '' of a comforter found inside the unit detected blood . Powell 's wife has been missing since December 2009 . Police say Josh Powell killed his two sons and himself last Sunday .