In the SFST walk-and-turn test, how many steps must the suspect take back down the line?

In the Standardized Field Sobriety Test (SFST) walk-and-turn test, the suspect must take nine steps back down the line. This part of the test is designed to assess the suspect's ability to follow instructions and maintain balance while performing a task that requires divided attention.

During this test, the individual is instructed to take nine heel-to-toe steps in one direction and then return to the starting point by taking another nine heel-to-toe steps back down the line. The specific task of taking nine steps back is critical to forming a comprehensive evaluation of impairment, as it tests not only the physical coordination of the suspect but also their ability to process and execute instructions. Proper adherence to the steps and any deviations can indicate levels of impairment, making it essential that the exact number of steps be maintained for the integrity of the test.