Dharamshala, Sept. 15 -- The Central Bureau of Investigation (CBI) on Sunday arrested suspended assistant sub-inspector (ASI) Pankaj Sharma in connection with the mysterious death of Himachal Pradesh Power Corporation Ltd (HPPCL) chief engineer Vimal Negi. This is the first arrest in this case.

It is being alleged that Sharma had tampered with a pen drive recovered from Negi's body - a key piece of evidence in the case. Negi had gone missing on March 10 this year and his body was found in a lake in Bilaspur eight days later. His wife had claimed that Negi had been facing continued harassment from his seniors.

As per the allegations, ASI Sharma had hidden the pen drive recovered from Negi's body and formatted it. The ASI was under police...