[7] While engaged in combat at the Lourenço Marques Airport in what is now Maputo, Mozambique, Rousseau rounded a corner and encountered a FRELIMO fighter armed with an AK-47 at ten paces (7.5 m (25 ft)) from his position.
In 1980, two Los Angeles Police Department Metropolitan Division SWAT officers, Larry Mudgett and John Helms, attended pistol training at Gunsite and received permission from Cooper to teach the technique to the LAPD.
Following the September 11 attacks, the changing nature of counterterrorism and counterinsurgency threats—and the chance of encountering suicide bomb vests—led to it being largely replaced by other techniques within special forces units.
The practice of firing rounds in pairs has been retained, but modern approaches rely on high-capacity magazines to prioritize target incapacitation over conserving ammo.
To ensure instant incapacitation by impacting the brain and central nervous system, the head shot should be delivered to the area between eyebrows and upper lip where the bone is thinnest.