Thursday marks one year since the deaths of Toronto billionaires Barry Sherman and Honey Sherman.

The pair were found dead inside their North York home by a real estate agent in 2017. They were in the process of selling their mansion.

Detectives initially believed it was a case of murder-suicide, but then ruled the couple was murdered.

Barry Sherman founded the pharmaceutical giant Apotex.

The two were well-known philanthropists and donated millions to institutions like hospitals and universities.

Toronto Police have remained tight-lipped about the ongoing investigation.

Meanwhile, the Sherman family has hired its own team of private forensic experts.

In October, the family offered up a $10 million reward to find the killer or killers.