Jurors at the Hamilton trial of the two men accused of murdering Tim Bosma in 2013 are hearing from witnesses about surveillance video police gathered during their search for Bosma.

Various video feeds from local businesses showed a black pickup truck moving along nearby streets in the time after Bosma left his home in the Hamilton suburb of Ancaster to take two men on a test drive of a truck he was trying to sell.

But the time the videos were recorded is a topic of contention with the defence, which is questioning the accuracy of police testimony and that of a business owner whose camera recorded footage of a black truck.

Both Dellen Millard, 30, of Toronto, and Mark Smich, 28, of Oakville, Ont., pleaded not guilty to first-degree murder at the start of the Superior Court trial, which is now in its fourth week.

Bosma, 32, was last seen on May 6, 2013, and was missing for more than a week before remains were found on May 14 on an Ayr, Ont., farm owned by Millard. Earlier in the trial, the Crown told jurors the remains belonged to Bosma.

Millard was charged with murder on May 15, 2013, and Smich was charged a week later, on May 22.

On Tuesday, Hamilton's top pathologist, Dr. John Fernandes, said the remains found in a livestock incinerator were so badly burned that they could not be identified.

​CBC reporter Adam Carter is in the courtroom each day reporting live. You can read his blog here, starting at 10 a.m. ET.