Officers with the Hamilton Police Service spent several hours Monday inside a hangar at the Region of Waterloo International Airport, but little is known about what they were doing inside.

A police forensics van pulled up near the hangar – belonging to Millard Air, the family business of Dellen Millard, charged in the disappearance of Tim Bosma – shortly after 10 a.m. Monday and remained on site all day.

Police have said they are now focused on the Kitchener-Waterloo area in their search for Bosma, 32, who hasn’t been seen since May 6, when he left his Ancaster-area home with two men who had asked to test-drive his truck.

One of the men, 27-year-old Dellen Millard, was arrested Saturday in Mississauga and charged with theft over $5,000 and forcible confinement.

The other suspect remains at large. He is described as white with a medium build, 5’9” with dark hair and wearing a red hooded sweatshirt.

Bosma’s truck was seen May 6 in downtown Brantford. His cellphone was recovered from an industrial park in Brantford’s west end a few days later.

Police spent several days searching an area near the Grand River between Brantford and Paris, but officers did not return to that site Monday.

Meanwhile, police say they may have recovered Bosma’s truck inside a trailer at a property north of Toronto, reportedly at the home of Millard’s mother.

According to police, the trailer was parked in a driveway in Kleinburg, just outside Vaughan.

Officers entered the trailer searching for Bosma, but instead found the pickup truck, which they cannot confirm belongs to Bosma until obtaining a search warrant.

Millard’s family founded and ran Millard Air, a charter airline company.

Speaking to CP24 on Monday, Millard’s lawyer called his client an entrepreneur with no history of criminal behaviour.

“He is a very balanced young man, very humble, I had no idea who he was before this case,” said Deepak Paradkar.

Paradkar said his client was “100 per cent not guilty” and will remain silent until investigators reveal the evidence against him.

Hamilton Police have set up a tip line for the Bosma investigation at 905-546-2100.

With files from CP24