The classrooms of the University of Idaho are half empty after four students were murdered in their house

The lecture halls at the University of Idaho are half empty after the Thanksgiving break, as the students are too frightened to return to four of their classmates after the brutal unexplained unexplained.

The returned students meet additional precautionary measures, including the installation of door bell cameras, the reinforcement of windows and wearing pepper spray with the police, which does not get closer to the search for a suspect.

On November 13, around noon, the police found the bloodstained corpses of four students on the second and third floor of a house outside the campus.

The victims - Ethan Chapin, 20, Kaylee Goncalves, 21, Xana Kernodle, 20, and Madison Mogen, 21 - were killed in sleep.

Two roommates who slept elsewhere in the house heard nothing, the police said.

Goncalves and Mogen spent the evening before in a local bar and returned to their house shortly before 2 a.m.

chapin and Kernodle spent the evening at a party in a connecting house and returned home about the same time.

The following day the police were called by another, nameless student of the house, who believed that one of her roommates had passed out.

According to the forensic doctor, the victims were stabbed several times. Although they slept, there were some defense wounds - which indicates that they had tried to defend themselves.

There was no signs of violent penetration, nor was the murder weapon - presumably a large knife with a fixed blade - was found at the scene.

The police, who could not identify a suspect or a motive for the cruel attack, tried to assure the students and the city that there is no “community risk”.

The investigation is confused.

On November 16, Moscow police chief James Fry said that it was a "targeted attack" without giving any further details.

Then Bill Thompson, the local prosecutor, said that at least one of the victims had been attacked.

his statements were then "clarified" by the police, who said that she did not come to the conclusion "whether the goal was the apartment or its residents".

Alivea Goncalves, the sister of one of the victims, said the families had not received any further information.

"The law enforcement agencies 'targeted' this word, but we don't know what that means, and it feels almost strange because we have no further information about it," she told CNN.

The case employs the USA and dominates reporting for weeks.

At the same time, criticism of the lack of progress of the police in the 25,000-inhabitant city of Idahos, the last murder of which was recorded in 2015.

On Sunday, the police said that they had overlooked more than 2,645 emails sent to their tip hotline, as well as almost 2,800 calls and 4,000 photos of the crime scene.

The lack of information from official sources has prompted “Internet detectives” to spread a number of theories on social media, much to the annoyance of the police.

"There is speculation without factual basis that stir up fears and spread false information," said the police authority.

Only tested information would be passed on to the public.

Dylan Mortensen and Bethany Funke, two other students who slept on another floor of the house at the time of the murders spoke for the first time.

"I wish every day that I could all hug them one last time and say how much I love them," wrote Ms. Funke.

"You always told me that everything is happening for a certain reason."