LAHORE: The Counter Terrorism Department (CTD) officials tried to deceive forensic scientists by altering evidences of the Sahiwal police encounter incident, ARY News reported.<br /><br />According to details, the CTD officials changed weapons and police mobile van for forensic test into the notorious police encounter case.<br /><br />Sources said a police mobile van was riddled with bullets for using as an evidence. About hundred rounds were recovered from the site where this act was staged, they added.