New True Crime Book Revisits Teresa Sievers Murder

By Dana Whitfield. Sep 20, 2026

Cover of A Double Life: The Anatomy of a Premeditated Murder by Mikita Brottman. Credit: Citadel / Kensington Publishing

A New Book Returns to the Teresa Sievers Case

Mikita Brottman’s A Double Life: The Anatomy of a Premeditated Murder is scheduled for publication Sept. 29, 2026. The nonfiction book revisits the 2015 murder of Florida physician Teresa Sievers and the network of relationships that investigators later examined around her death.

Sievers ran a medical practice in Bonita Springs that focused on anti-aging and holistic care. Her husband, Mark Sievers, helped manage the business while the couple raised two daughters.

The crime became nationally known because the investigation ultimately moved from an apparent home invasion toward people within the family’s own orbit.

Brottman Focuses on the Private Life Behind the Public Case

The publisher describes A Double Life as an examination of the marriage, business, friendships and private dynamics surrounding the murder. That approach gives the book a different emphasis from a straightforward chronology of arrest, trial and sentence.

True-crime books often have more room than news coverage to examine the parts of a life that did not fit neatly into courtroom testimony. Brottman’s work is positioned around that broader context, while the legal record remains the anchor for what was established in court.

The distinction is important because an author’s interpretation can explore relationships and contradictions without changing the facts of the criminal case.

The Case Already Has a Legal Outcome

The Sievers murder is not an unresolved mystery being reopened by the book. Mark Sievers was convicted in connection with his wife’s killing, and other defendants were prosecuted as part of the case.

That settled legal history allows the book to ask a different set of questions: how a marriage and social circle looked from the outside, what investigators discovered once they moved closer to the people around Teresa, and how seemingly separate relationships became relevant to a murder prosecution.

Readers therefore do not have to wait for a future verdict to know where the criminal case ended. The new material is the author’s reconstruction and analysis of how the case developed.

A Literary Treatment Can Slow the Story Down

Daily crime reporting often compresses years into a few sentences. A book can linger on chronology, personal history and the smaller decisions that shaped an investigation.

A Double Life is 288 pages, giving Brottman room to examine the case as a relationship story as much as a courtroom story.

For readers drawn to true crime because of motive, betrayal and hidden lives, that is the book’s central promise. The murder is the event that made the relationships public, but the narrative is about understanding the world that existed before investigators began pulling it apart.

References: Penguin Random House - A Double Life by Mikita Brottman