1. Heenan & Cook, PLLC Personal Injury Attorneys of Heenan & Cook, PLLC serves Billings, MT. Led by Billings personal injury attorneys, Heenan & Cook, PLLC law firm offers services to those in need of a car accident lawyer, accident attorney, wrongful death defense, and more. Our firm is dedicated to protecting the rights of people who have been injured, harmed or wronged by others. We determine the best course of action to seek fair & reasonable compensation for clients. Contact us today to schedule a free consultation - (406) 839-9091. No fee unless you win!