Former Mumbai police commissioner Param Bir Singh, now suspended, failed to appear before the Anti-Corruption Bureau (ACB) here on Tuesday till noon to record his statement in connection with an open enquiry being conducted against him on a complaint lodged by a police inspector, an official said.

Singh, who was suspended from service after multiple extortion cases were registered against him, was summoned to appear before the ACB on Tuesday but he hasn't appeared till noon, he said.