Convicted killer Robert Pickton told investigators he had "one more planned" during an exhaustive 11-hour interview in which he came extremely close to confessing his crimes.

The video, released to the public on Monday, shows Pickton toying with investigators, telling them he would say more if he could speak to a female friend of his first, or if police would stop digging up his pig farm.

"I had one more planned, but that was, that was the end of it. That was the last I was gonna shut it down, that's why I was just sloppy. Just the last one," Pickton says to Staff Sgt. Don Adam during the Feb. 2002 interview.

"You were going to do one more," Adam replies.

Pickton continues: "That was the end of it. That's why I got sloppy because the other thing never got that far."

Pickton does not elaborate on what he means by "the other thing."

The interrogation tape was unsealed Friday along with a recording of a 2002 jail cell conversation Pickton had with his cellmate who was actually an undercover agent. Technical problems delayed the release of the interrogation until Monday.

The tapes were released after a court-ordered publication ban was lifted after the Supreme Court of Canada denied Pickton the opportunity to appeal his convictions.

Pickton is serving a life sentence on six counts of second-degree murder, with no eligibility for parole for 25 years.

Pickton was first charged with murder in 2002 after police launched an exhaustive search of his pig farm in Port Coquitlam, B.C., about 30 kilometres east of Vancouver.

After the Supreme Court's decision, the Crown stayed 20 additional murder charges as Pickton's sentence is already the maximum under Canadian law.

During the interview, police try a number of tactics to get Pickton to talk, including bringing in a female officer.

CTV's Alberta Bureau Chief Janet Dirks said it takes police hours to get Pickton to open up and he spends a lot of time "talking about the banalities of his life," including his love of pork sandwiches and a cat he had as a child that was killed.

"He's playing, if one could say playing, he's playing the hick, he's playing the naïve guy who doesn't seem to know anything that's going on and keeps repeating ‘I'm just a pig farmer,'" Dirks told CTV News Channel Monday afternoon.

But the cat-and-mouse game begins when Adam takes over the interrogation.

"Pickton is saying at first he doesn't know anything and then he tries to deal, he gives a little bit of information, then he backs up."

Both tapes were key evidence presented by the Crown during Pickton's trial and offer the public some insight into the mind of Canada's worst serial killer.

In the jail cell recording, Pickton talks about killing 49 women and says he would kill more given the chance.

"I was gonna do one more, make it an even 50," Pickton tells the undercover officer. "Make it the big five-zero. (Expletive) half a hundred."

A three-year investigation of Pickton's farm ultimately uncovered the dismembered bodies, bones and DNA of more than two dozen women from Vancouver's Downtown Eastside.