The trial of the two men accused of murdering Hamilton resident Tim Bosma has entered its fourth week today.

Afternoon testimony is coming from the Canadian distributor of the livestock incinerator in which Bosma's remains were found. The testimony is covering the unit's operation and history.

Jurors also heard Monday from Darryl Denny, a chief building official in the rural township of North Dumphries, near Waterloo, Ont., in 2013. Dellen Millard's farm was located in North Dumfries.

Millard, 30, and Mark Smich, 28, are each charged with first-degree murder. 

On Thursday, forensic pathologist Dr. Tracy Rogers testified the remains of a whole body were not found in the incinerator police discovered on the Millard farm.

Rogers testified in Ontario Superior Court that the lack of remains indicated to her The Eliminator had been cleaned out. 

"There are a lot of remains that are not there," she told the jury, saying she was asked for help in May 2013 by Hamilton police officers who were investigating the disappearance of 32-year-old Bosma.

"There should have been a complete body there basically, but there wasn't… So obviously, it had been cleaned out at some point."

CBC reporter Adam Carter is in the courtroom each day reporting live on the trial. You can read his live blog here:

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