What did August Vollmer not do to improve the caliber of police personnel?
A. Established police training
B. Introduced psychological testing
C. Began recruiting college students
D. Required all applicants to take a polygraph examination
Answer:D
What did August Vollmer not do to improve the caliber of police personnel?
A. Established police training B. Introduced psychological testing C. Began recruiting college students D. Required all applicants to take a polygraph examination