The trial of former aides to Dalton McGuinty has heard the Liberal Party of Ontario paid a consultant $11,000 to wipe clean computer hard drives in the Premier’s office to get rid of emails that related to the cancellation of gas plants days before the 2011 general election. The trial of the aides, David Livingston and Laura Miller, heard from that consultant Friday. He is Peter Faist and his employment in this came matter came about because he is also the common-law spouse of Ms. Miller. He testified that she asked him if he knew someone who could wipe clean the 20 or so hard drives and he told her that he could do it himself. The party’s refusal to hand over documents related to the cancellation to a legislature committee triggered a contempt debate that eventually saw McGuinty resign as premier in the fall of 2012.