Police said Friday they believe Canadian drug-company billionaire businessman Barry Sherman and his wife were both murdered.
Det. Sgt. Susan Gomes said investigators came to the conclusion after six weeks of investigation, but said there are no suspects.
The founder of generic drugmaker Apotex and his wife, Honey, were found dead in their mansion on Dec. 15. Police said then the deaths were suspicious, but said there were no signs of forced entry and they were not looking for suspects.
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Gomes said the two were found hanging by belts from a railing that surrounds their indoor pool and were in a semi-seated position on the pool deck.
"We have sufficient evidence to describe this as a double homicide investigation and that both Honey and Barry Sherman were in fact targeted," Gomes said.
She said they were last seen alive in the evening hours of Wednesday Dec. 13 and were not heard from again until their bodies were found late Friday morning.
Gomes said there are no signs of forced entry at access points of the home. She declined to discuss the evidence, possible motives or suspects.
"We haven't developed any suspects," Gomes said.
The day after the bodies were found, some prominent news media outlets quoted unidentified police officials as saying the deaths appeared to be a murder-suicide. That upset the couple's four adult children, who then hired their own team of investigators and a pathologist, who conducted second autopsies on the Shermans.
The family said in a statement Friday that the new conclusion "was expressed by the family from the outset and is consistent with the findings of the independent autopsy and investigation.
"The family continues to support the Toronto Police Service in their efforts to seek justice for their parents and pursue those responsible for these unspeakable crimes," the statement added
Police have released the home back to the family.
Toronto police investigators have scoured the 12,000-square-foot home, hauled away the couple's cars and even checked the sewers in one of Toronto's most exclusive neighborhoods for clues. Police have taken 125 witness statements and analyzed surveillance video in the neighborhood.
Sherman, 75, was known for litigiousness and aggressive businesses practices as he developed Apotex Inc., which has a global workforce of about 11,000.
In "Prescription Games," a 2001 book about the industry, he mused that a rival might want to kill him.
"The branded drug companies hate us. They have hired private investigators on us all the time," he said. "The thought once came to my mind, why didn't they just hire someone to knock me off? For a thousand bucks paid to the right person you can probably get someone killed. Perhaps I'm surprised that hasn't happened."
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.
As they became wealthy, the couple became known for philanthropy. They gave tens of millions to the United Jewish Appeal, donated to a geriatric hospital in Toronto and sent medicine to disaster zones. Prime Minister Justin Trudeau attended the funeral and Sherman is posthumously due to receive one of the country's highest civilian honors this year.
Friends and family say the couple had been making plans for the future. They had recently listed their home in Toronto for 6.9 million Canadian dollars and they were building a new home in the city. Gomes said anybody who has had access to the home in recent months is important to them.
Frank D'Angelo, a close friend of Barry Sherman, felt vindicated by the double homicide ruling after some thought it was a murder suicide following the early reports.
"There was absolutely unequivocally no way that he would hurt his wife, and hurt his grandkids, his family and his reputation," Sherman said.
"What a horrible ending for a great man."
The chief executive of Apotex, meanwhile, announced Friday he is leaving the company. Dr. Jeremy Desai had been CEO of Apotex since 2014.
Apotex spokesman Jordan Berman said Friday he didn't know why Desai was leaving, but said he resigned to pursue other opportunities. Berman sad Desai's departure was not related to the Toronto police press conference.
Desai's resignation comes as he faces allegations in a U.S. lawsuit from Teva Pharmaceutical Industries Ltd. for allegedly accepting trade secrets from a Teva employee that he was thought to be in a romantic relationship with.
The lawsuit, filed last July in a Pennsylvania federal court, accuses Barinder Sandhu, who worked as a senior director of regulatory affairs for Teva's U.S. generics division, of sharing trade secrets and other confidential information about Teva's product development with its competitor Apotex through Desai.