ANCHORAGE--Keyes had been staking out Eklutna and North Fork trailhead in Eagle River, around mile 7.4, Anchorage Police said Monday. There, the confessed killer allegedly had a cache of disposable equipment for a plan to kill, that never was carried out.

"I had that place set up for a while, I had a bag stashed in the bushes there, with all my stuff in it, and a cut-off tool, battery powered cut-off tool, and a pad lock, " Israel Keyes said in a May 8th interrogation video. "The plan there was, I had that parking lot staked out waiting, I was going to take them, and use the cut-off tool to lock the gate and then do my thing there in the parking lot, and then I had the Drano and the shovel stocked up there as a way to get rid of the body if I needed."

In April or May of 2011, officials claim Keyes almost shot two people and an APD officer, who showed up to raise awareness about the park closing hour at Point Woronzof.

"It could of got ugly, for the cop guy, his back-up showed," said Keyes in an audio recording. " I mean APD is really good, like all by the book and stuff and that's about the time I decided to get a scanner, because I almost got myself in a lot of trouble on that one, because I didn't think he would call up back-up just for some kids sitting in a park."

"Point Woronzof was connected to him wanting to try out the silencer he built, it was the silencer that he used in the Vermont killing," said Chief Mark Mew, with the Anchorage Police Department. "He was leaving shortly there after, he left in early June to go to Vermont."

When it comes to Keyes' motive, detectives say at least part of it was simple.

"Israel Keyes didn't kidnap and kill people because he was crazy, he didn't kidnap and kill people, because his diety told him too, or because he had a bad childhood," said Anchorage Police Department's Detective Monique Doll. "Israel Keyes did this, because he got an immense amount of enjoyment out of it, much like an addict gets an immense amount of enjoyment out of drugs, at the end of the day he was an addict."

Authorities believe Keyes may have killed up to 12 people.

If you have any information contact 1-800-CALL-FBI