How many murders cases were attributed to the serial killer on whose crimes the film L'assassino è ancora tra noi is loosely based ?
L'assassino è ancora tra noi:  It is loosely based on the crimes of the Italian serial killer known as "the Monster of Florence". Monster of Florence: The Monster of Florence (Italian: Il Mostro di Firenze) is the name commonly used by the media in Italy for a series of eight double murder cases that took place between 1968 and 1985 in the province of Florence, Italy.
eight double murder cases