The Law Offices of Dion J. Custis, P.C. provides guidance with legal matters on all levels. I am a professional criminal defense attorney in Cheyenne, WY and I provide representation for cases in State and Federal Courts in Wyoming and Colorado. I have been practicing law since 1994 and I am strongly devoted to the representation of the criminally accused. The Law Offices of Dion J. Custis, P.C. provides you with full time and experienced representation. I have represented clients in all types of criminal cases, from infractions to those facing long term sentences. My goal as a criminal defense attorney is to provide successful and efficient legal representation to anyone that has been accused of a crime. I served as a Federal Law Clerk and I have dedicated my life to protecting and providing services to protect the general public. I strive to give the highest quality legal representation to my clients. I provide successful criminal defense attorney services and representation because I am very meticulous with each and every case that I am involved with and will dedicate 100% of my skills to your case. I am licensed in the State of Wyoming with my home office in Cheyenne. I am also licensed in the State of Colorado with my home Colorado office in Fort Collins. I am the owner of his solo law practice, emphasizing in personal injury and criminal defense. I have handled every type of criminal case from DUI to Death Penalty cases and have practiced in every court including Municipal, County, State District Court, Federal District Court, Federal Court of Appeals, Wyoming Supreme Court and State and Federal Courts in Colorado.

Derek grew up in Gillette, Wyoming and graduated from Campbell County High School in 2009. He went on to attend the University of Wyoming and graduated with a B.S. in Political Science in 2013. While in college, Derek worked as a summer student at Eagle Butte and Bell Ayr mines driving haul trucks. Derek continued on to attend law school at the University of Wyoming College of Law and graduated in 2016. While in law school Derek was on the championship team in the 2014 Hirst Applegate Mock Trial Competition. His team went on to compete in the regional competition in Seattle, Washington. Derek also competed in the law school's client counseling competition. Derek was a recipient of the law school's "Excellence in Advocacy" award. Throughout law school, Derek worked as an intern at the Nick Carter Law Firm and worked for the firm in his first year of practice. Derek briefly left the firm and worked as a contract public defender and civil attorney, he gladly rejoined the Nick Carter Law Firm in June 2018.

Don Sullivan has spent his entire career – over 40 years – fighting for regular people. He only represents real people who’ve been harmed by the misconduct and neglect of others – insurance companies, governments at all levels, hospitals and doctors, manufacturers, and the rich and powerful. Don has helped the Little Guy against: -a tire manufacturer whose defective tire killed several college kids -a Spanish gun manufacturer whose defective pistol destroyed a cop’s leg -a New York police department that hid evidence and put an innocent man in prison for many years -a surgeon whose refusal to return the nurse’s call turned his patient into a paraplegic -an ENT who got confused and drilled a hole into the patient’s brain -the hospital which gave a healthy young mom a full bag of insulin instead of antibiotics, and left her permanently unable to move, speak or show any reaction -careless drivers – the distracted guy on his cell phone, the trucker speeding after too many hours on the road, the drunk driver – who have caused families driving the highways of Wyoming to have their lives turned upside down. Don even established the legal rule that now holds bars responsible for selling alcohol to people who’ve had too much to drink, then hurt innocent people with their impaired driving.

Charles Barnum was born on March 15, 1971, in Rock Springs, Wyoming. He graduated from Rock Springs High School in 1989. Mr. Barnum attended The University of Wyoming and received a Bachelor of Science in Economics in 1993. Immediately after graduation, Mr. Barnum enrolled in Law School at the University of Wyoming and received his Juris Doctorate in 1996. Proud to be a Wyoming native and lifelong Wyoming resident, Mr. Barnum resides in Rock Springs with his wife, Jodi. They have two children, Charlie and Katelyn. They enjoy being outdoors and spending time with their grandchildren. Mr. Barnum is a member of the Wyoming Trial Lawyers Association, Wyoming Bar Association, American Bar Association, and Sweetwater County Bar Association. He is a member of the Million Dollar and the Multi-Million Dollar Advocates Forum.

William Fix is a practicing lawyer in the state of Wyoming.

Jeffrey Tennyson is a practicing lawyer in the state of Wyoming handling personal injury matters.