John Newberry began his work in the legal field while in law school, where he served as a clerk for Snowden, Craine, & DeCooper. Upon graduating from the University of Missouri-Kansas City School of Law in 1975, John became an Associate for Snowden, Craine, & DeCooper. While there, John practiced criminal law for five years where he handled a wide range of Felony cases including: domestic assault, armed robbery, and possession of drugs. After serving as an Associate, John entered into private practice where he continued to handle domestic and criminal cases. However, John also pursued traffic and Federal tax cases. In fact, many of the Federal tax cases that John appeared on required him to argue before Federal District Courts across the United States. These include: Colorado, Minnesota, Indiana and Missouri.