Derek Puffer has agreed to skip a preliminary hearing on charges of second-degree murder in the deaths of Bill Powers and Donna Lee.
The couple was found stabbed to death in their Calgary home in July.
Puffer, Lee's adopted son from her first marriage, was living with the couple.
A trial date is expected to be set by mid-February.
Powers retired in October 2009 after almost 50 years in the sports broadcasting and communications business.
He worked mainly in radio and was also media co-ordinator for a time for the CFL Calgary Stampeders.
Puffer was found mentally fit to stand trial in October.
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