Anthony Senter and Joseph Testa

Anthony Senter (born March 31, 1955) and Joseph Testa (January 24, 1955 – January 26, 2026), better known as the Gemini twins, are two American mobsters who were associated with the Gambino crime family before being "made" in the Lucchese crime family. Senter and Testa are former members of the DeMeo crew in the Gambino family. In June 1989, both Senter and Testa were found guilty of racketeering and 10 counts of murder, and each was sentenced to life in federal prison. However, both men were eligible for parole since their crimes were committed before federal parole was abolished in 1987. Senter and Testa were paroled in 2023 and 2024, respectively. It is believed Testa and Senter had participated in at least 28 murders, from between 1975 and 1987, although they were initially indicted in 1989 for committing 11 murders. Testa and Senter primally worked for Gambino family soldier Roy DeMeo before his murder in January 1983, and later for Anthony "Gaspipe" Casso and Vic "Little Vic" Amuso, who served as underboss and family boss, respectively, for the Lucchese family, before Casso defected as a government witness in March 1994, and Amuso continues to serve as the Lucchese family boss since his accession in 1987. Casso admitted to participation in at least 36 murders, some of which Testa and Senter had also participated with. According to former Assistant U.S. Attorney and Deputy Police Commissioner of New York City for Internal Affairs, Walter Mack Jr., he had linked Testa and Senter to committing 20 murders.