Disturbing emotion of Idaho murderer is revealed and 911 call riddle explained by cops probing slaughter of 4 students

THE killer behind the gruesome murders of four University of Idaho students was proud of the weapon he used in the killings, police have said.

One of the victims' father said police revealed to him that the unknown killer's weapon offered a big clue to the brutal slayings in the off-campus home in Moscow, Idaho.

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"The detective said this weapon is probably something [the killer] paid money for and something that they're proud of," Kaylee Goncalves' father Steve told ABC News.

Kaylee, 21, and her roommates Madison Mogen, 21, and Xana Kernodle, 20, as well as Xana's boyfriend, Ethan Chapin, 20, were found dead at home on November 13.

The murder weapon, which has not been found, has been described as a "Rambo-style knife."

Goncalves said the victims' autopsies showed they had "large punctures" from a "brutal weapon."

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Police found the gruesome scene in the Moscow home after receiving a 911 call from one of the girls' two other housemates, according to officials.

The unnamed roommate reported an unconscious person before police found the four dead bodies.

Meanwhile, one of the students' neighbors has denied being involved in the murders after online sleuths began speculating.

“I didn’t do it. I have nothing to hide. I’m willing to give DNA, fingerprints, whatever they need,” Jeremy Reagan told CourtTV on Tuesday.

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Online sleuths began suggesting Reagan as a possible suspect after he gave interviews about the murders.

"I’m naturally an awkward person, just my mannerisms, the way I talk… my natural person, just a little bit socially awkward so I might smile at points that I shouldn’t, I might make weird hand movements when I shouldn’t,” the law student added.

Reagan said online commentators have already contacted his friends, and he is now carrying a gun, "especially now where cyber sleuths may or may not come."

On Tuesday, authorities towed away five vehicles that have been parked in front of the house since the murders.

“There will be an increase in detective activity and tow trucks onsite as investigators move five vehicles from within the police perimeter to a more secure long-term storage location to continue processing evidence,” Moscow Police said.

Horror killings

No suspect has been identified in the murders.

Police believe Madison and Kaylee were at a local bar called Corner Club between 10pm on November 12 and 1.30am on November 13.

"At approximately 1.40am, Kaylee and Madison were seen on video at a local food vendor called the “Grub Truck” at 318 S. Main Street and used a private party for a ride home from downtown to arrive at their 1122 King Road residence around 1.56am, police said.

It is believed that Ethan and Xana returned home around 1am on November 13, after being at a fraternity house.

At 11.58am, a call was made to police about someone unconscious from the surviving roommate's phone.

Multiple people were on the call, police said.

When officers arrived, they found two victims on the second floor and two victims on the third floor.

Autopsies showed the four victims were stabbed to death, likely in their sleep.

While each victim was stabbed multiple times, there was no sign of sexual assault, police said.

Suspects ruled out

Police have looked into information about Kaylee having a stalker.

They have not been able to "verify or identify" the stalking claims.

Police do not believe the roommates, man in the surveillance footage of the Grub Truck, the person who drove Kaylee and Madison home, or anyone at the home when 911 was called were involved in the killings.

They have also ruled out a man Kaylee and Madison called multiple times that morning, who reports referred to as Kaylee's ex-boyfriend.

The Moscow Police Department, The Idaho State Police, the FBI, and the Latah County Sheriff’s Office are investigating.