Gunnery Sgt. Joseph Felix was found guilty of dozens of criminal counts. U.S. Marine Gunnery Sgt. Joseph A. Felix and his wife exit a courtroom after testimony at Camp Lejeune, N.C., Oct. 31, 2017.

Marine recruits’ first experiences at boot camp typically involve getting yelled at. A lot. Although they may not appreciate it at the time, there is a proper technique to yelling and screaming at ...