A two-day search of Dellen Millard’s North Dumfries farm failed to turn up any evidence relating to the disappearance of Laura Babcock, Toronto Police said at a Tuesday afternoon news conference.

Police had combed through the farm for two days last week as part of their investigation into the disappearance of Babcock, 23, who was last seen in Toronto’s Roncevalles neighbourhood on July 14, 2012.

Ground-penetrating radar devices and digging equipment were seen at the farm, with investigators digging one hole that appeared to be five feet deep.

Police say Babcock, who had worked in the sex trade, was reported missing by an ex-boyfriend who became concerned when he could no longer reach her.

The investigation was reignited after Millard was arrested and charged with first-degree murder in the death of Ancaster resident Tim Bosma last month.

Phone records showed multiple calls between Millard and Babcock, including the last call made from Babcock’s phone before she disappeared.

“There appears to be contact on July 3, 2012, between Laura Babcock and Mr. Dellen Millard,” said Det. Mike Carbone at the news conference.

“We are attempting to speak to other individuals who have been identified as having contact with Laura.”

Carbone said Babcock – whose disappearance is still considered a missing person’s case – was known to Millard through an unusual romantic relationship, though Millard was not connected with the sex trade.

“I would say that they were romantically linked, although I would not say that they had a traditional dating relationship,” he said.

Bosma’s burned remains were found at the same Roseville Road farm property police searched last week.

A dedicated phone line has been set up for the Babcock investigation at 416-808-2280.

She has been known to wear a bellybutton ring, has natural brown hair and is deaf in her right ear.

Carbone also updated the investigation into the death, initially ruled a suicide, of Millard’s father Wayne Millard.

He said the investigation into Millard’s death continues, but there were no further announcements.

Toronto Police are not investigating any other crimes in connection with Millard.