03/10/2016 07:08 EST | Updated 03/11/2017 00:12 EST

Missing Alberta seniors: Court hears no remains found in burned-out motorhome

EDMONTON — A forensic anthropologist has testified that no human remains were found in the burned-out motorhome of two Alberta seniors who vanished almost six years ago.

Owen Beattie has told a murder trial that he sifted through debris and found no remains.

Lyle and Marie McCann, who were in their late 70s, were last seen fuelling up the motorhome in their hometown near Edmonton on July 3, 2010.

The motorhome was found on fire in bush about 200 kilometres west of the city two days later.

The bodies of the McCanns have never been found, but the Crown is arguing they were robbed and killed by a desperate meth addict.

Travis Vader has pleaded not guilty to first-degree murder.