Toronto police continue to comb the grounds at a farm owned by a man charged in connection with the death of Tim Bosma, who went missing after taking two men on a test drive earlier this month.

Since early Tuesday morning, close to a dozen officers from Toronto’s homicide unit, Waterloo police and the OPP have been scouring a stretch of land owned by Dellen Millard near Cambridge, Ont. Investigators were seen dragging a GPS-based ground penetrating radar device to unearth potential new evidence.

“(The device) is a non-invasive technology that lets you see if there are any objects below the surface,” Paul Racher, an archeologist, told CTV Toronto.

Staff Insp. Greg McLane, who heads up the Toronto homicide department, said officers were "following up on information received and looking at a particular area of land."

He added: "We don't know what, if anything at all," will be found.

McLane confirmed the most recent visit to the farm is linked to the ongoing investigation into the death of Dellen's father, Wayne Millard, and the disappearance of Laura Babcock.

Earlier this month, police seized an incinerator on Millard's property, but investigators have not confirmed whether it is connected to Bosma’s death.

Bosma, a 32-year-old husband and father, disappeared from his Ancaster, Ont. home on May 6 after taking two strangers on a test drive of a pickup truck he had posted for sale online.

His charred remains were later found in the Waterloo area.

Laura Babcock, 23, has been missing since last July. She and Millard were friends and had a romantic relationship just before she disappeared last summer.

Millard is the last person Babcock called before she disappeared. He has been charged with first-degree murder in relation to the death of Tim Bosma.

According to Babcock’s mother, Linda Babcock, Toronto police have not contacted her about the ongoing search on Millard’s farm. She said if there are any new developments with regards to her daughter’s case, police have said they would contact her.

A second suspect, 25-year-old Mark Smich, has been charged with first-degree murder in Bosma's death, and police say they are also looking for a third suspect.

With a report from CTV Toronto’s Zuraidah Alman