There has been much speculation as to who was responsible for the murder; likely candidates include Dutch Schultz, the Oley Brothers (local thugs), the Albany Police Department, and relatives of Red Cassidy, another Irish American gangster at the time. According to William Kennedy's "O Albany", Democratic Party Chairman Dan O'Connell, who ran the local political machine, ordered Diamond's execution, which was carried out by the Albany Police. The following are Dan O'Connell's own words recorded during a 1974 interview by Kennedy and appear on pages 203 and 204: