Born in Montreal, Quebec, Campbell graduated from Osgoode Hall Law School in 1967.
He later was senior policy advisor to the current Chief Justice of the Superior Court of Ontario Roy McMurtry.
Outside of the AG office, Campbell worked briefly at the Parkdale Legal Clinic in 1977 and taught at Osgoode Hall.
[1] Campbell died of cancer and degenerative lung disease on 17 April 2007 in Toronto.
Campbell was selected from amongst the supernumerary justices of Ontario on 10 June 2003[4] by the government of Ernie Eves, whose Conservative colleagues held the legislature at the time of the inquiry's formation and indeed the SARS epidemic itself, which had hit the shores of Toronto on 23 February 2003.