THE GIRL WHO KNEW TOO MUCH (1963)
MARIO BAVA
Plot
Credited as being the first true 'Giallo' movie, Bava's fourth film is a classic Hitchcockian thriller starring Leticia Roman as an American tourist who witnesses a brutal murder that appears to be the latest in a series by the 'Alphabet murderer' and, with the help of hunky young Doctor John Saxon, sets about investigating the infamous slayings.