PUTRAJAYA: Inspector-General of Police Tan Sri Mohd Khalid Ismail has directed the Bukit Aman Criminal Investigation Department (CID) to conduct an immediate investigation into the death of Noorizwan Zulkefly, who died while in police custody at the Cheras District Police Headquarters (IPD). He said the investigation must be conducted thoroughly following the discovery of several unusual injuries on Noorizwan's body that warranted further scrutiny.