TORONTO -- A man who is already serving consecutive life sentences for two separate murders goes to trial today in Toronto charged in the death of his father.

Dellen Millard is charged with first-degree murder in the death of Wayne Millard, who was found dead in his bed in November 2012, a bullet lodged in his brain.

The death of the wealthy 71-year-old businessman was initially ruled a suicide, but two years later, police charged his son with murder.

Dellen Millard has pleaded not guilty and will be tried by judge alone.

In 2016, Millard and his friend, Mark Smich, were found guilty of first-degree murder the death of Tim Bosma, who disappeared after leaving his Hamilton home with two men who asked to test drive a truck he posted for sale online.

Millard and Smich were also later convicted -- and sentenced to life in prison -- in the murder of Laura Babcock, a young Toronto woman who vanished in the summer of 2012 and whose case was also reopened by police following Millard's arrest in Bosma's disappearance.