Piersanti v. Canada (SCC – Leave Application Dismissed – April 16, 2015)
Précis: On April 16, 2015 the Supreme Court of Canada dismissed, with costs, an application for leave to appeal the
Piersanti v. Canada decision of the Federal Court of Appeal which held that the Jarvis rule does not operate to exclude evidence in Tax Court proceedings.
Decision: Piersanti v. Canada (October 28, 2014 – 2014 FCA 243) was a decision affirming the Tax Court in dismissing the taxpayer’s appeal.
http://decisions.fca-caf.gc.ca/fca-caf/decisions/en/item/99321/index.do 
The taxpayer had alleged that the documents the Crown sought to introduce were obtained as part of a criminal investigation and should therefore be excluded. The Tax Court had applied the Federal Court of Appeal’s decision in Romanuk (blogged earlier on this site):
http://decisions.fca-caf.gc.ca/fca-caf/decisions/en/item/37789/index.do
which essentially held that the Jarvis rule did not operate to exclude the admission of evidence before the Tax Court.
The Supreme Court’s decision to dismiss, with costs, the leave application in Piersanti would seem to effectively put this issue to rest.
Source: Supreme Advocacy Letter #22
http://supremeadvocacy.ca/