Open this photo in gallery Barry and Honey Sherman pose for a photo in Toronto on Oct. 15, 2017. AP

The private investigation team hired by the family of slain billionaires Honey and Barry Sherman will be providing an update into their probe this Friday.

Brian Greenspan, counsel for the Sherman family, will be joined by “several members of his investigative team” at the Apotex offices Friday afternoon, according to a media release from the company.

Toronto Police Homicide Sergeant Hank Idsinga said Wednesday morning that his team was aware of the press conference, but added that he does not know what the update would be.

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Barry, 75, and Honey, 70, were found dead in their north Toronto mansion on Dec. 15, 2017. A real estate agent discovered the bodies in the basement pool area of the home, which was for sale. They were clothed, and “in a semi-seated position” on the pool deck, hanging from belts tied to a railing. The house showed no sign of forced entry.

Mr. Sherman, whose net worth was estimated to be $4.77-billion, was the founder of the global generic drug giant Apotex Inc. Mrs. Sherman was a well-known philanthropist.

Toronto Police sources were quoted early on as saying the leading theory was murder-suicide – sparking outrage from the couple’s adult children. A team of private investigators – including two former Toronto Police homicide detectives – were hired to conduct a parallel probe, “to provide a second lens and to ensure that no stone is left unturned.”

In January, police ultimately announced that the deaths were being investigated as a double-homicide. There have been no updates since.