Authorities have now concluded their search of the home of Douglas Garland’s parents northeast of Airdrie, after scouring the rural property for around two weeks.

Divers spent Saturday searching a pond on the property and Calgary Police say they would be teaming up with the National Research Council of Canada to conduct an aerial search.

On July 4, police first arrived at the Garland property and arrested Douglas Garland, 54, on unrelated fraud charges. They were led there after surveillance footage of a distinctive truck outside the Liknes home near the time of their disappearance was released.

Nathan O’Brien, Alvin Liknes, and Kathy Liknes have been missing since June 29.

Police officially declared them dead on July 14. Their bodies have still not been found.

Garland, the only suspect in the case, is facing three counts of murder in connection with their deaths.