The unsolved murder of an unusual billionaire

Last December, Canadian pharmaceuticals boss Barry Sherman and his wife, Honey, were strangled in their own home. No-one knows who did it, or why. Matthew Campbell reports.

Last December 15, two real estate agents arrived at a sprawling, modern house near the northern edge of Toronto. They were accompanied by a couple, who were considering buying the 12,000-square-foot mansion at 50 Old Colony Rd, recently listed for just shy of C$7m (€4.68m).