Final answer:
The given passages do not explicitly mention the term describing the stable platform a police officer uses for shooting. A shooting platform usually refers to the body posture and mechanics used by an officer to create stability for accurate firing.
Step-by-step explanation:
The term you're looking for that describes the solid platform a police officer uses to stabilize their body for rapid and accurate shooting does not seem to be explicitly mentioned in the passage provided.
However, generally speaking, the concept of creating a stable shooting platform refers to the human body posture and mechanics which allow for a stable firing position.
This can include the officer’s stance, grip, and body alignment that collectively create a supportive structure or platform. The passages you've shared appear to describe a different situation and do not provide information on law enforcement shooting techniques.