30-year-old Trivedi, a pacer, had refused to accept an invitation by Ajit Chandila, a player arrested on charges of spot-fixing, to attend a party arranged by bookies. He had also refused money and gifts offered by the bookies.
"He is being made a prosecution witness," a senior police official said.
Investigators believe that Trivedi's deposition in the case will make their case stronger.
Chandila had approached Bradd Hodge and Kevin Cooper of Rajasthan Royals to attend the bookies' party but they had also rejected the invitation.
A total of 26 people, including former players, have been arrested from various parts of the country since May 16.
