Hyderabad Police have booked actress Rakul Preet Singh's brother Aman Preet Singh in connection with the high-profile Masab Tank drugs case, reports said. Authorities believe Aman is a regular user and are currently searching for him, Newsbytes reported. "He (Aman) is suspected to have purchased drugs five times from the two peddlers," NDTV quoted a senior police official as saying.