How is the three point pin performed once the subject is on the ground?

The three point pin is a technique used in defensive tactics to control a subject effectively once they are on the ground. By maintaining control of the subject's right arm, the officer is able to limit the subject's mobility and reduce their ability to fight back or escape. This control over the arm is crucial because it creates a disadvantage for the subject, making it difficult for them to gain leverage or use their upper body for resistance.

In contrast, while controlling both legs or using only one knee might seem effective, they do not adequately fulfill the requirements of the three point pin, which aims for comprehensive immobilization and control. By focusing on the arm, the officer can ensure they have both a dominant position and authority over the subject's actions, which is essential in law enforcement encounters. Not placing a knee on vulnerable areas such as the neck helps avoid unnecessary harm while still achieving a secure hold.