The University of Idaho student murder investigation is being "botched" by "incompetent" cops, it is alleged.
Moscow Police have failed to find a suspect a week on from the fatal stabbings of Kaylee Goncalves, 21, Madison Mogen, 21, Xana Kernodle, 20, and Ethan Chapin, 20 on November 13.
According to a source close to the investigation, police have "botched" the search and authorities have likely "obliterated" a colossal amount of evidence at the scene.
Cops were measuring tire tracks in the driveway of the rental home where the students were killed on Monday - more than a week after their bodies were found.
Police have also cordoned off a section of woods near the property after failing to identify a suspect or murder weapon.
James Fry, from the Moscow Police Department, gave a press conference on Sunday where he struggled to give answers on the murders.
Sources reportedly believe police are likely to have destroyed key evidence due to their slow response.
A source told OK! magazine: "The reality is this evidence was likely obliterated and if the cops had done things correct.
"Those tire marks would have been photographed, measured, and preserved, on the day when the victims were found.
"The time that elapsed between when the bodies were found and forensics team returned to the crime scene allowed crucial evidence to be corrupted, by weather or other activity.
"With no suspect, no murder weapon and little to no leads, you have to ask the question: did police botch the investigation from the get-go?"
During a press conference on Sunday, Mr Fry was unable to give conclusive answers after being asked where cops were searching for the killer.
In addition, he could not answer how four people could be stabbed to death without the other two roommates in the home noticing.
He simply responded: "We're looking everywhere."
Heartbroken parents Steve and Kristi Gonclaves, who lost their daughter Kaylee, have slammed the cops for their lack of findings and believe the crime was done by a "sloppy" killer.
Steve told Fox News : "This wasn't like a pinpoint crime. This person was sloppy.
"The killer made a mess there, and they're going to have to go through that point by point.'
He also revealed cops said the investigation "will take a lot of time to process" after receiving over 640 tip-offs.
Police have also conducted more than 90 interviews so far.
