What is the current state of the law in the United States when seeking to extradite an alleged criminal to Canada?

The rationale for this approach was articulated by Moldaver J.A. in United States v. McDowell[5] as follows: …there is good reason for Canada to insist that evidence gathered in Canada conform substantively with our rules of evidence. such a rule does not place an onerous burden on the requesting partner. It does however preserve the integrity of our justice system by affording fugitives the protection of our laws and values while they remain in Canada. In that way, the Act provides a front-line check on the methods used by both foreign and domestic law enforcement agencies to collect evidence in Canada.