An affidavit released last week offered a look at the investigative work that went into identifying Bryan Kohberger as the suspect in the killing of four University of Idaho students.
DNA allegedly found on a knife sheath at the crime scene: Trash recovered from the Pennsylvania home of Kohberger’s family late last month and sent to the Idaho State Lab for DNA testing revealed that the “DNA profile obtained from the trash” matched a tan leather knife sheath found “laying on the bed” of one of the victims, according to the probable cause affidavit.
The DNA in the trash “identified a male as not being excluded as the biological father” of the suspect whose DNA was found on the sheath.
“At least 99.9998% of the male population would be expected to be excluded from the possibility of being the suspect’s biological father,” the affidavit said.
According to the affidavit released last week, the suspect in the case falls into what criminal profilers call an “organized offender,” who likely planned and prepared for the attack, said CNN Chief Law Enforcement and Intelligence Analyst John Miller.
But the suspect made a “rookie mistake,” Miller said: leaving the knife sheath at the crime scene. Other experts agree.
Roommate saw a figure dressed in black clothing and a mask: One of two roommates who were not harmed told investigators she saw a masked man dressed in black in the house the morning of the attack, according to the probable cause affidavit.
Identified in the document as D.M., the roommate said she “heard crying” in the house that morning and a male voice saying, ‘It’s OK, I’m going to help you.’”
D.M. told investigators she saw a “figure clad in black clothing and a mask that covered the person’s mouth and nose walking towards her,” according to the affidavit.
“D.M. described the figure as 5’ 10” or taller, male, not very muscular, but athletically built with bushy eyebrows,” the affidavit said. “The male walked past D.M. as she stood in ‘frozen shock.’”
“The male walked towards the back sliding glass door. D.M. locked herself in her room after seeing the male,” according to the document, which said the roommate did not recognize the male.
Surveillance video pointed to a white sedan: Authorities reviewed local surveillance footage and were drawn to a white sedan, later identified as a Hyundai Elantra, according to the affidavit. The vehicle was seen in the area around the home where the killings took place.
By Nov. 25, local law enforcement had been notified to be on the lookout for the vehicle, the affidavit said.
Days later, officers at nearby Washington State University, where the suspect was a PhD student in criminal justice, identified a white Elantra and found it was registered to Kohberger.
Kohberger’s driver’s license information was consistent with the description the unharmed roommate gave investigators, according to the affidavit.
The document specifically noted Kohberger’s height and weight – 6 feet and 185 pounds – and that he has bushy eyebrows.
White Elantra at the Pennsylvania home of Kohberger’s parents: Kohberger received a new license plate for his Elantra five days after the killings, the affidavit said, citing records from the Washington State Department of Licensing.
At the time of Kohberger’s arrest last week, a white Elantra was found at his parents’ house in Pennsylvania, according to Monroe County Chief Public Defender Jason LaBar, who said Kohberger had gone home for the holidays.
Suspect’s phone used at least a dozen times near the students’ residence: Phone records show Kohberger’s phone was near the victims’ residence at least 12 times since June, according to the court documents. “All of these occasions, except for one, occurred in the late evening and early morning hours of their respective days.”
Additionally, records show Kohberger’s phone was near the murder scene – 1122 King Road – between 9:12 a.m. and 9:21 a.m. – hours after the killings, according to the court documents.
A review of phone records showed Kohberger’s phone left his home at approximately 9 a.m. and traveled to Moscow, the affidavit said, and that the same phone traveled “back to the area of the Kohberger Residence … arriving to the area at approximately 9:32 a.m.”
CNN’s Dakin Andone, John Miller, Elizabeth Joseph and Veronica Miracle contributed to this story.