Toronto homicide detectives have taken over the investigation of the deaths of billionaire Barry Sherman and his wife after autopsies showed they died from "ligature neck compression."

Police released a statement Sunday reporting the cause of death. Authorities also identified pharmaceutical magnate Sherman and his wife, Honey, as the two people found dead in a north Toronto mansion Friday.

Police call the deaths suspicious, but on Friday also said that there were no signs of forced entry and that they were not looking for any suspect.

The Sherman family issued a statement Saturday urging police to conduct a "thorough, intensive and objective criminal investigation" into the deaths and calling on the media to avoid speculating on the cause of the deaths.

Canadian Business magazine recently estimated his worth at 4.77 billion Canadian dollars ($3.65 billion), making him the 15th richest person in the country.

But the Shermans didn’t flaunt their wealth. He drove beat-up cars. They recently put up their house for sale for 6.9 million Canadian dollars ($5.4 million), but the home is relatively modest for a billionaire.