Following his retirement from the Army, Grossman founded the Killology Research Group to give seminars about the physiological and the psychological effects of having to use lethal force for law enforcement officers and soldiers.
Grossman also speaks at civilian events on ways to reduce violence in society and deal with the aftermath of violent events such as school shootings. As a civilian Grossman has been an expert witness in numerous state and federal court cases and was part of the prosecution team of United States vs. Timothy McVeigh.
In 2022, Killology Research Group was renamed and rebranded to Grossman On Truth.
In this episode we chat about his books "On Combat" and "On Killing". We also get a peek into what is coming next, which include a new work in progress about the importance of sleep.