In 1967 through 1968 Apsche served as a Helicopter Door Gunner with the First Cavalry Division Airmobile in the Vietnam War and he was highly decorated for his service.

VCR follows from the assessment and case conceptualization process steps and is aimed at validating the clients' past experiences, clarifying the resultant core beliefs, and redirecting behavioral responses that are caused by associated fear and coping mechanisms.

Apsche is the principal author of the book titled "Mode Deactivation Therapy for Aggression and Oppositional Behavior in Adolescents: An Integrative Methodology Using ACT, DBT, and CBT".

[11] In 2008, Apsche appeared in the Investigation Discovery program Escaped, which described the experience of one of Heidnik's surviving victims, Josefina Rivera.

While Heidnik was in prison, Apsche communicated with him, stating afterwards that in the more than 150 handwritten pages of letters he found the roots of a way to treat troubled youth in the killer's mind.

[13] Apsche also provided expert testimony during the trials of serial murderers Harrison "Marty" Graham and Juan Covington.