It is not mandatory to perform or to blow into a handheld roadside breath test. STANDARD FIELD SOBRIETY TESTS (SFST) After being certified in Standard Field Sobriety Tests, Mr. Vaughn suggests that you do not perform field sobriety tests. This does not mean that you will not be arrested, but will give law enforcement less ammunition at trial. Remember, law enforcement officers begin to take notes of your faculties as…