| Intro | American mobster |
| Was | Mobster |
| From | United States of America |
| Type | Crime |
| Gender | male |
| Birth | 7 January 1917, Chicago, Cook County, Illinois, U.S.A. |
| Death |
5 November 2002 (aged 85 years) |
William Joseph Messino was an enforcer and adviser to top bosses in the Chicago Outfit. He was known as Wee Willie because of his small stature. Despite his diminutive frame, Messino had a reputation as a decidedly violent enforcer.
In the 1960s, he worked for Tony Accardo and Joseph Gagliano. In 1970, he was sent to prison after being convicted of kidnapping and beating contractors George and Jack Chiagouris, brothers who owed money to the mob. After his release in December 1976, he went to work as an adviser to Marco D’Amico and then to Outfit chief Jackie Cerone. He died in 2002.