Wiebo Ludwig talks with reporters at his Trickle Creek Farm near Hythe, Alta., during a police search of his property last month. (CBC)

CBC has obtained a copy of the search warrant executed last month on Wiebo Ludwig's farm near Hythe, Alta., in connection with the investigation into the bombing of natural gas pipeline sites in B.C.

RCMP arrested Ludwig on Jan. 8 and held him overnight for questioning as part of their investigation into six bombings between October 2008 and July 2009 at facilities owned by Alberta-based energy giant EnCana.

They also searched Trickle Creek Farm, Ludwig's 325-hectare property in Hythe.

No charges were laid, but police said the search advanced their investigation.

Ludwig has been a vocal opponent of the environmental degradation and disruption caused by oil and gas facilities near his community and served time in jail for bombings of oil and gas wells in Alberta in the 1990s.

The search warrant police used to enter Ludwig's property cites:

• Records of calls made from the Ludwig residence in the period in which the explosions occurred. The officer swearing the warrant notes on the warrant that "to date, none of the follow-up conducted as a result of these records has provided any evidence as to the persons responsible for the explosions."
• DNA the police claim belongs to Ludwig found on the envelope of a letter sent to EnCana about a week after the sixth bombing in July 2009. "You have five years to shut down and remove all the oil and gas facilities you have established over the last eight years in our territories of the Tomslake and Kelly Lake districts. Don't delay!!" the warrant quotes part of the letter as saying.
• Interviews with visitors to Ludwig's farm.

Among the items police were looking for during their four-day search of Ludwig's property were computers and computer equipment; envelopes and writing paper; video footage and cameras; photographs; explosives and detonation devices; and a pair of shoes with treads matching a photo police took near one of the bombing locations.

What police actually came away with after searching the farm has not been revealed, and nothing mentioned in the warrant has been proven in court.

At the end of the search, RCMP insisted the right person had been arrested.