Michael Fiaschetti (January 8, 1882 – July 29, 1960) was a prominent New York detective and succeeded Lt. Joseph Petrosino as head of the NYPD's "Italian Squad".
Although he had found evidence that Don Vito Cascio Ferro may have not been responsible, he was forced to leave when he had been in attendance at a meeting in which Camorra leaders had been informed of Fiaschetti's presence and were attempting to get a description of him.
Although a protégé of Petrosino, his own methods differed from his predecessors including his preference in working with a network of police informants in favor of undercover surveillance and other standard investigative procedures.
Although he had been forced into retirement after having a lawyer-politician removed from the premises after interrupting an interrogation, he was brought back by reform Mayor Fiorello La Guardia in the early 1930s as deputy commissioner of the Department of Markets in an attempt to investigate racketeering in New York's produce industry.
In 1938, he returned to private detective work following the elimination of his position and continued lecturing on organized crime throughout the country as well as taking part in training programs for the Army Reserve until his death at Brooklyn's Veterans Administration Hospital on July 29, 1960.