Answer:
Major Calvin H. Goddard, an American forensic scientist, was a pioneer on the study of forensic ballistics; the police used his services and knowledge to help in the investigation of a Chicago massacre occurred after St. Valentine's Day in 1929, and through a police raid on the mobsters' home (Al Capone's hit men) the weapons they found were tested by Goddard proving they were also used in the massacre; thus he was asked to lead the 1st independent forensic laboratory and later the FBI crime Laboratory.
Step-by-step explanation: