'1st used in police work by Berkeley, Ca.'s chief August Vollmer in the 1920s, this tool measures pulse, B.P. & respiration'
a lie detector
THE BOYS IN BLUE: 1st used in police work by Berkeley, Ca.'s chief August Vollmer in the 1920s, this tool measures pulse, B.P. & respiration
1st used in police work by Berkeley, Ca.'s chief August Vollmer in the 1920s, this tool measures pulse, B.P. & respiration
1st used in police work by Berkeley, Ca.'s chief August Vollmer in the 1920s, this tool measures pulse, B.P. & respiration
THE BOYS IN BLUE
a lie detector
THE BOYS IN BLUE