Chilling diary of man's plan to kill kin

Authorities said Peter Keller was planning the construction of the bunker as far back as 2004.

• Peter Keller shot and killed his wife and daughter in April, sheriff says
• He was found six days later in a self-built bunker in the woods
• He left behind a video diary and a gun that linked him to the killings, police say
• The videos are "breathtaking in its evil," sheriff says

(CNN) -- A video diary released Thursday gives an eerie view into the planning process of a man police say murdered his wife and daughter and then killed himself in a fortified bunker he built in the woods in Washington state.

Peter Keller shot and killed his wife Lynnettee Keller, and their 18-year-old daughter, Kaylene Keller, and then set a fire in their Seattle-area home in April, the King County Sheriff's Office said. A video diary Keller left behind touched on his decision to kill his family but still gave little information on his reasons.

"A while ago I used to sit here and think you know this whole thing is crazy," Keller said as he wandered in the woods wearing a gray sweatshirt, his hair wild and disheveled. "The more I thought about it. The more I understand it. I don't really feel bad about it. It is just the way it is ... I won't have to worry about Lynnettee or Kaylene. Everything will just be taken care of. It will just be me."

King County Sheriff Steve Strachan said the video, and other evidence found at the fire-damaged home and in the bunker, revealed that Keller was planning the construction of the bunker as far back as 2004.

At a news conference Thursday afternoon, Strachan detailed how authorities were able to hunt down Keller even though he was hiding underground in the bunker in a remote area of the Cascade foothills about 25 miles east of Seattle.

Clues of Keller's whereabouts came while investigators were processing evidence at his burned home. The fire did not move beyond the kitchen of the home and failed to ignite a pipe bomb in the residence.

"The suspect in this case intended for all this evidence to be burned and it wasn't," said Strachan.

Peter Keller was found dead in his bunker six days after his family was killed.

Authorities found a hard drive with photos. One of photos, taken by Keller in a wooded area, showed power lines and helped in the search, Strachan said. People in the area also reported seeing Keller's pickup truck in a section of the woods, helping detectives narrow their search.

Keller was found in the well-camouflaged bunker six days after the slayings. After a standoff, SWAT team memebers blew a hole in the roof of the hideout with explosives and saw Keller's body.

In the elaborate bunker, that had rooms, mulit-layers and a wood stove, authorities found a gun that matched the one used to kill Keller's family. They also found the video diary that was shot by Keller and showed him talking to himself.

The video was "breathtaking in its evil," Strachan said.

"It is a little bit chilling because it makes you very aware of the fact that he planned to go in to the bunker weeks, months probably years ahead of time and also indicates that he planned to commit the double homicide years ahead of time," said Strachan.

In the video diary, Keller also spoke about what he would do if he was captured by police.

"I do have my escape and that's death," Keller said with a laugh. "I can always shoot myself. And I am OK with that."

The victims' family is setting up a scholarship fund in the memory of Lynnettee Keller, that may be funded in part by tens of thousands of dollars also found in the bunker.