Dr. James L. Greenstone is a psychotherapist, mediator, arbitrator, negotiator, author, professor, police officer, editor-in-chief, military officer, and police behavioral health specialist. He is well known as a police hostage negotiator and trainer. Formerly, he served as the director of psychological services for the Fort Worth, Texas, Police Department and as the operational police behavioral health specialist for the hostage and crisis negotiation team. Dr. Greenstone served as the director of behavioral health services and a deputy constable for the Tarrant County Precinct 4 Constable’s Office.

Currently, he serves as a deputy for the Tarrant County Sheriff’s Office and is a member of the Training Advisory Board. He has been a police officer for almost forty years and in practice for 50 years. Dr. Greenstone is the author of The Elements of Police Hostage and Crisis Negotiations: Critical Incidents and How to Respond to Them, The Elements of Disaster Psychology: Managing Psychosocial Trauma, and The Elements of Crisis Intervention (3rd ed.). He is the editor-in-chief emeritus of the Journal of Police Crisis Negotiations and served on the governing Council of the Committee on Publication Ethics. Additionally, he is a diplomate of the Society for Police and Criminal Psychology.

His new book, Emotional First Aid: Field Guide to Crisis Intervention and Psychological Survival, was published by Whole Person Associates. His newest book On Policing: From Swords into Plowshares will be out in early 2018. Recently, Dr. Greenstone was elected a Fellow of the Royal Society of Medicine in London, England. Also, he was a collaborating investigator for the Diagnostic and Statistical Manual, Fifth Edition (DSM-5).

                                       Currently, Dr. Greenstone is the editor-in-chief of the Journal of Police Emergency Response: International Journal of Hostage Negotiations and Crisis Intervention.