If they are doing it in the U.S., you can be sure Canadian cops are doing it as well.

Thomas Fox-Brewster, Forbes:

Separate sources close to local and federal police investigations in New York and Ohio, who asked to remain anonymous as they weren’t authorized to speak on record, said it was now relatively common for fingerprints of the deceased to be depressed on the scanner of Apple iPhones, devices which have been wrapped up in increasingly powerful encryption over recent years. For instance, the technique has been used in overdose cases, said one source. In such instances, the victim’s phone could contain information leading directly to the dealer.