The key question was whether an RCMP shoe-print expert should have been permitted to testify at David Scott Hall's 2000 trial for the murder of a Sault Ste. Marie woman, Peggy Jo Barkley-Dube.

Although shoe print lifting isn’t the only method officers rely on to match a shoe to a print, the other techniques are also time-consuming. Stringham said in addition to taking photos, casts ...