Kevin Wise, 47, was found dead in his Camarillo home Wednesday from a gunshot wound to the head. Wise was supposed to be in court to testify in the trial of his childhood friend Greg Winslow.
Winslow is accused of diverting funds from the Ventura College basketball team, which he coached, to his personal bank account.
Earlier, Wise had testified that Winslow opened a joint account in his name.