After serving briefly in the United States Army, Mr. Callahan began a career in the criminal justice system that has spanned three and a half decades. He has worked in law enforcement, corporate security management, and in institutional and community corrections where he now works as a presentence investigator. He has also taught Criminal Justice at the college level and coached AYSO soccer and Little League baseball. He has a bachelor’s degree in Criminal Justice from Georgia State University and a Masters of Public Administration from Arizona State University. Raised in the metropolitan Atlanta area, he now makes his home in the Phoenix, AZ suburbs where he resides with his wife.
Mr. Callahan has published five novels and is currently working on his sixth novel.