On September 28, a bomb exploded on the front porch of Powers' home. In spite of great damage, no one inside was hurt. Powers suspected that Ammatuna was the bomber on orders from the Gennas. For the rest of 1920 and into 1921, Powers stationed armed guards and private detectives around his house as he campaigned against Anthony D'Andrea. Despite frequent bombings, Powers narrowly won the election. Enraged by his defeat, Angelo Genna blamed Paul Labriola, a municipal court bailiff and a Powers supporter, for convincing Sicilian and other Italian immigrants to support Powers. On March 9, 1921, Angelo, Ammatuna, and Genna lieutenant Frank "Don Chick" Gambino shot and killed Labriola. Witnesses identified Genna and Gambino, and the two men were charged with murder; however, the case was eventually dropped due to lack of evidence. Ammatuna was later a suspect in the murders of Powers' supporters Harry Raimondi and Gaetano Esposito.