Wiebo Ludwig, who was arrested on Friday morning and questioned in connection with a series of pipeline bombings in British Columbia, spoke out on Sunday about his time in police custody.

Ludwig told CTV News he was questioned for hours before he was released on Saturday morning, and that interrogators likened his struggle to that of South African president Nelson Mandela.

"It was a 10-hour drilling to try and break my spirit, and compare me to Nelson Mandela and all that kind of ego-tripping," Ludwig said.

One of the people interviewing him was retired Mountie Don Adam, considered one of the best interrogators in the country. Adam headed up the Robert Pickton serial murders case.

Ludwig also said police had issued a warrant for a sample of his DNA days before his arrest.

"They said there was DNA of mine on the envelopes," he said. "They pressed that so hard."

Ludwig was previously convicted of bombing sour gas wells in Alberta and served two-thirds of a 28-month sentence.

But Ludwig said police never asked whether he had a role in the Encana bombings in northern B.C.

Ludwig declined to say how he would have responded, but added that he had "obviously stirred up a lot of stuff."

Ludwig's lawyer said Friday that his client was told he'd be charged with extortion in connection with six natural gas pipeline bombings along with letters demanding that Calgary-based EnCana energy cease operations.

RCMP Insp. Tim Shields repeated Sunday that police have unearthed new evidence to hand over to prosecutors in B.C., who make the call on any charges in the case.

"We have obtained new evidence within the last 48 hours that we will be submitting to Crown counsel and we believe that this evidence is significant," he said Sunday in an interview.

"Ultimately, it will be Crown counsel's decision as to whether or not a criminal charge is justified."

But Shields says there is no rush to lay charges, so the investigation will continue without a deadline. RCMP continued to search Ludwig's sprawling farm in northwest Alberta near the border with British Columbia Sunday for evidence in a half-dozen pipeline bombings over the last two years in northeastern B.C.

A woman at the Ludwig farm confirmed by telephone that dozens of Mounties are still searching the buildings and property, which is home to more than 50 people.

Shields confirmed the search of the farm may continue for several days.

"We have investigators on the property day and night and the warrant expires on Tuesday evening," he said. "We're confident that we'll have that search completed before the expiry of the warrant."

With files from The Canadian Press and a report from CTV British Columbia's Lisa Rossington