Delhi Police Commissioner Amulya Patnaik is due to retire on February 29 but there has been no announcement on his successor. While that had prompted some speculation about another extension for Patnaik, the Delhi riots and the apparent failure of the police to contain them have virtually removed that possibility. So will it be S N Shrivastava, the next senior-most officer in the AGMUT (Arunachal-Goa-Mizoram Union Territory) cadre, who has just been repatriated from the Central Reserve Police Force? That National Security Advisor Ajit Doval did not take Patnaik with him during his visits to the riot-affected areas after Shrivastava’s