National Security Advisor Ajit Doval presented the President's Police Medal for Distinguished Service to 34 CBI officers on International Anti-Corruption Day, observed on Wednesday, officials said. The awardees included ASP Suman Kumar, who probed a bank fraud case against businessman Vijay Mallya, and ASP Vijay Kumar Shukla, who probed the Badaun suicide case and Tuticorin custodial death case.