>> reporter: by one or more people determined to see them die in their own home. >> honey and barry sherman were found deceased in the lower level pool area, hanging by belts from a poolside railing in a semiseated position. >> reporter: there were no signs of forced entry. police are talking to neighbors, witnesses, family members, business associates. anyone who knew anything about their lives or last hours. this murder mystery has shaken many not just in this affluent toronto neighborhood, but the area. they were high profile billion nars, barry, a pioneering drug tycoon always willing to take on big far ma and his wife, patron of several charities. together, they gave away tens of millions. they died such a horrific way.