Plains Law Offices, LLP is a law firm that was founded by Kenneth DeCock and Erin Mercer in 2004. If you need a DUI or Criminal Defense Lawyer, a Divorce or Child Custody Attorney, have been denied Workers’ Compensation benefits, or are involved in a civil dispute, contact Plains Law Offices, LLP. Located in Sheridan, Wyoming, Kenneth and Erin also work with clients in Gillette, Casper, Cheyenne, Lander, Worland and all across the State of Wyoming.