The murder of poor Albert Snyder had one other unusual feature: the people responsible were caught. That didn't actually happen much in America in the 1920s. New York recorded 372 murders in 1927; in 115 of those cases no one was arrested. Where arrests were made, the conviction rate was less than 20 percent. Nationally, according to a survey made by the Metropolitan Life Insurance Company--and it is notable that the best records were kept by insurers, not police authorities--two-thirds of America's murders were unsolved in 1927.