 The trial commenced with the prosecution's opening statements on February 12; prosecutors Andrew Maloney and John Gleeson began their case by playing tapes showing Gotti discussing Gambino family business, including murders he approved, and confirming the animosity between Gotti and Castellano to establish the former's motive to kill his boss.After calling an eyewitness of the Sparks hit who identified Carneglia as one of the men who shot Bilotti, they then brought Gravano to testify on March 2.On the stand, Gravano confirmed Gotti's place in the structure of the Gambino family and described in detail the conspiracy to assassinate Castellano, giving a full description of the hit and its aftermath.