 Complete the following phrase:  In Pakistan, law enforcement authorities interrogated Rashid Rauf, a Briton of Pakistani descent, over his alleged key role in the plot. Pakistani Interior Minister Aftab Khan Sherpao said British police were conducting inquiries in Pakistan but were not involved in questioning Rauf. The UK Foreign Office sought Raufs extradition from Pakistan, and it was reported that Pakistan planned to accept the request. However, in mid-December 2006, terrorism charges against Rauf were dropped by a Pakistani judge, who ruled there was a lack of evidence. Raufs case was transferred from a terrorism court to a regular court where he faced lesser charges including forgery. The charges were later dropped, and Rauf was reported killed in a US 