David is a Missouri native. He was born in Cape Girardeau and grew up in both the Festus and Arnold areas. He attended high school at Providence Christian Academy in Sappington and earned his bachelor degree from Oklahoma Baptist University in 2005.
Upon graduation, David worked at Farmers Insurance Group as a claims manager and oversaw over 60 employees. He then decided to further his education and ultimately graduated from Saint Louis University School of Law in 2013. During law school, David interned at the Jefferson County Prosecuting Attorney's Office throughout the summer of 2012, and interned for attorney Joseph Rubin in St. Charles County in the fall of 2012. He served as an assistant prosecuting attorney in the Jefferson County Prosecuting Attorney's Office in Hillsboro for 5 years. As a prosecutor, David gained valuable bench and jury trial experience and learned the ins and outs of criminal prosecution and a real sense of “how the other side thinks.”
After , David worked as an attorney with Wegge & Casey, P.C. before beginning the Casey Law Office, L.L.C. in 2022 where he enjoys a diverse practice of felony and misdemeanor criminal law and some civil.
David shares time between St. Louis and Jefferson County, is an active member of the Missouri and Jefferson County Bar Associations and the National Academy of Criminal Defense Attorneys, and serves on the board of the Jefferson County Rescue Mission, which provides food and other emergency services to indigent people in the Jefferson County area.