
During the trial, Prosecutor Susan Hoffinger presented crucial evidence to the jury in the form of emails exchanged between key players in the case. One such email, sent by Robert Costello to Michael Cohen on April 19, 2018, revealed the news of Rudy Giuliani joining Trump's legal team. In the email, Costello highlighted his close relationship with Giuliani, hinting at its potential usefulness for Cohen.
Costello's email to Cohen was followed by another email he sent to Jeff Citron on the same day, emphasizing the importance of Cohen hiring him due to his connection with Giuliani. This correspondence shed light on Costello's efforts to leverage his ties with Giuliani for professional gain.