An expert stated the fixed-blade, Ka-Bar-style knife the police are seeking, which is linked with the tragic deaths of four University of Idaho students, dulls rapidly and would have likely injured the attacker due to the required physical power to use it.

Since the beginning of the inquiry, police have said that they are searching for a "fixed-blade knife" that is thought to have been used in the quadruple murder on November 13, according to Fox News.

The manager of Moscow Building Supply told The Idaho Statesman earlier this month that the police had asked if the store had any Ka-Bar knives. They are not offered by the shop, he said.

Law enforcement expert and former FBI agent Jonathan Gilliam said that the knife type indicates how the Idaho college murders may have developed.

The former US Navy SEAL stated he had first-hand knowledge of Ka-Bar knives and that they tend to become dull rapidly and are frequently utilized for survival-oriented tasks like peeling bark, digging holes, and slicing leather.

How the Murder Knife May Lead to Suspect's Identification

Gilliam noted that the knife is "not going to be as thin and able to slice" as other knives. One may sharpen it again, but it will get dull momentarily because it has a thick blade. He also noted that it is common for the knife's tip to snap off.

The expert elaborated, saying that Ka-Bar knives are often utilized for cuts that require thrusting actions rather than smoother motions, and the more the user pushes, the more he gets weary.

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Gilliam believes the Idaho college murders culprit would have bruises or wounds on the palm of their hand as the knife's slickness increased with its dullness.

Investigators would probably find a series of lesser and "smaller wounds" on the victims as the attacker conducted the crime, which probably became more violent with each victim, Gilliam said on Dr. Phil on Monday.

Victims' Loved Ones Get Frustrated on Slow Progress of Investigation

According to Captain Roger Lanier of the Moscow Police Department, an "army" of experts is now reviewing the recordings that have been sent in through the FBI's tip website.

The official said Monday the recordings came "from all around town" and it takes "a lot of time" for them to process them because of the length of the submitted footage, as per a report from ABC News.

Nearly one month has passed since University of Idaho college housemates Kaylee Goncalves, Madison Mogen, and Xana Kernodle, along with Kernodle's boyfriend Ethan Chapin, were slain in their off-campus residence.

Authorities said two surviving housemates, who are not suspects, were at home during the assaults but presumably slept through them. They were on the bottom level, while the four victims were on the second and third stories.

As of present reporting, nobody has been named as a suspect, leaving some of the victims' loved ones frustrated over the investigation's poor progress.

Lanier assured the public that the police are absolutely 100% dedicated to solving this crime, according to BBC.

The father of Idaho college murders victim Kaylee Goncalves stated on Sunday that the victims had large open "gouges" that were the work of a "sadistic" person.

Police have warned locals and students to be cautious and on guard while in town, even though authorities have indicated they don't see any current danger.

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