The Juventus coach could find himself further implicated in the match-fixing scandal rocking Italy, despite constant denials by both himself and his former club
The midfielder was detained by police last December as part of the ongoing Scommessopoli investigations into the match-fixing of several Serie A and B matches in 2010-11.
He claimed in his testimony that Mezzaroma sent a messenger down to the locker room to ask the players about the possibility of losing so he could win money on a bet, something the coaching staff, then including Conte, were aware of. Nevertheless, Carobbio and co then went on to defeat their opponents 5-0, while Siena and Conte have now moved to officially deny the player's allegations.
However, Carobbio's claims, given to investigators in Cremona, were damning of Mezzaroma.
"Before the Serie B match between Siena and Varese, president Mezzaroma sent someone close to him to the locker room to ask about the possibility of losing the game.
"That person then went on to say the president had wagered on our defeat.
"I later learned from our assistant coach that the coaching staff also knew of this arrangement made by Mezzaroma," Carobbio revealed.
Conte, who led Siena to promotion to Serie A that campaign, had his house ransacked by police as part of the investigations on Monday. If Carobbio's statements are proven, the coach could be ascribed on the charge of failing to report Mezzaroma's misdeeds.