Dennis P. Deters was born in Cincinnati, Ohio. He earned a bachelors degree in English from the University of Notre Dame and received his law degree from the University of Cincinnati. He also served as a Hamilton County (Cincinnati) Common Pleas Court Constable and worked as a law clerk to the Honorable William S. Matthews, the Honorable Fred Cartolano, and the Honorable John P. O'Connor. His legal career began as an Associate attorney at Schroeder, Maundrell, Barbiere and Powers. There he litigated a wide variety of cases defending police departments, municipalities, and large insurance companies throughout Ohio. He also prosecuted and tried personal injury claims.

In 2004, Mr. Deters took a leave of absence from the practice of law to chair and manage his brother, Joe Deters' successful write-in campaign for Hamilton County Prosecutor.

Soon after, he joined his friend, Daniel Haughey in his private practice. He became a Butler County Public Defender, and handled hundreds of criminal cases involving traffic, misdemeanor, juvenile and felony charges. Mr. Deters gained invaluable experience at every stage of the criminal justice system, from arrest to trial. Throughout this period, Mr. Deters maintained a personal injury practice, scoring numerous victories over defendants and their insurance companies. In 2007, Haughey and Deters was formed.

Mr. Deters has completed numerous Continuing Legal Education courses, dealing with a wide array of topics related to the practice of criminal law, including DUI, warrants, evidence, speedy trial, trial preparation, sentencing, investigations, conflicts of interest, client testimony, misconduct, ethics, personal injury, damages, premises liability and tort reform.

In 2008, Dennis was appointed the Butler County Area II Court Felony Public Defender, where he handled all Felony cases for indigent defendants. He also serves as the designee/hearing officer for the Princeton City School Board.  In 2009, Dennis was elected Colerain Township Trustee on the November ballot.  Colerain is Ohio largest township.

Also in 2009 Dennis Deters was honored as an Ohio Super Lawyer, "Rising Star". He lives in Hamilton County with his family.