Dr. Hewitt is a prolific author, and he is in demand for his consulting services. He offers his skills for any part of the publishing process, including writing, editing, reviewing, ghost-writing, and crafting the winning proposal.

Mark is an award-winning public speaker, sharing on the topic of true crime, including the Zodiac serial killer, Charles Manson, and other notorious criminals and cases. He is available for podcast interviews, network interviews, and media consultant positions.

Mark has served as a life coach, mentor, and motivational speaker. He provides research and investigative assistance for any scholarly topic, especially true crime and unsolved mysteries.