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MOSCOW, Idaho — Nearly seven weeks after four University of Idaho students were brutally murdered, police arrested a suspect more than 2,500 miles away in eastern Pennsylvania.

Bryan Christopher Kohberger, 28, a PhD student at Washington State University in Pullman, Washington, was arrested on December 30 and charged with four counts of first-degree murder and felony burglary for the Nov. 13 stabbing deaths of Ethan Chapin, 20; Madison Mogen, 21; Xana Kernodle, 20; and Kaylee Goncalves, 21.

Mogen, Kernodle and Goncalves lived with two other students in a six-bedroom home off campus at 1122 King Road near fraternity row. Chapin, who was dating Kernodle, was staying the night.

This is what is known about what happened before and after the killings and the progress of the investigation.

UNIVERSITY OF IDAHO HOMICIDES: WHAT TO KNOW ABOUT THE 4 VICTIMS ALLEGEDLY KILLED NEAR CAMPUS

A photo illustration of the crime scene

A split photo showing the crime scene and the victims: University of Idaho students Ethan Chapin, Xana Kernodle, Madison Mogen and Kaylee Goncalves. (Angela Palermo/Idaho Statesman/Tribune News Service via Getty Images/Instagram/@kayleegoncalves)

Saturday, Nov. 12 – Goncalves' final Instagram post

At 8:57 p.m., Goncalves posted a series of cheerful pictures on Instagram with the caption, "One lucky girl to be surrounded by these pple everyday."

In one of the photos, Mogen sits on Goncalves’ shoulders, as Chapin and Kernodle stand next to them smiling.

University of Idaho victims

The four victims appeared to be friends based on their social media interactions and posted a photo with two other friends just hours before they were found dead on Nov. 13. (Instagram: @kayleegoncalves)

That night, Mogen and Goncalves hung out at Corner Club, a downtown bar at 202 N. Main St., while Chapin and Kernodle went to a party together at the Sigma Chi house at 735 Nez Perce Drive on campus, according to police.

Sunday, Nov. 13 – Two victims spotted at Grub truck

Mogen and Goncalves were captured on a Twitch livestream at 1:41 a.m. at the Grub truck in downtown Moscow, where they ordered carbonara and chatted with people nearby.

A man wearing a hoodie standing near them became the subject of intense online speculation, but police later said he is not a suspect.

A sorority driving service got them home at about 1:56 a.m., according to police and family.

Chapin and Kernodle returned home from Sigma Chi at about 1:45 a.m. The two female roommates who survived the attack returned home from their night out at 1 a.m. and didn’t wake up until late the next morning.

Alivea Goncalves told Inside Edition that her sister, Kaylee, called her ex-boyfriend, Jack DuCoeur, seven times between 2:26 a.m. and 2:44 a.m. Police have cleared him as a suspect.

The murders

The four victims were stabbed to death with a fixed-blade knife between 3 a.m. and 4 a.m. on the second and third floors of the home, according to police. The murder weapon has not been recovered.

Madison Mogen and Kaylee Goncalves

Madison Mogen and Kaylee Goncalves shared photos together on social media. (Instagram/@kayleegoncalves)

The surviving roommates summoned friends to the house because they believed one of the second-floor victims had passed out.

UNIVERSITY OF IDAHO MURDERS: TWO ROOMMATES WERE AT HOME WHEN FOUR STUDENTS WERE KILLED

A call to 911 was placed from one of the surviving roommates' phones at 11:58 a.m. from inside the residence, reporting an unconscious person. Police said multiple people spoke to the dispatcher.

At 2 p.m. Sunday, the university notified students of the homicides and told them to "shelter in place."

University of Idaho victims

Police have named the four victims of a quadruple homicide at the University of Idaho as Madison Mogen, Ethan Chapin, Xana Kernodle and Kaylee Goncalves. (Instagram: @maddiemogen, @kayleegoncalves, @ethanchapin4)

However, the order was lifted an hour later.

Monday, Nov. 14 – Conflicting accounts

Moscow Mayor Art Bettge told a news outlet that the slayings were a "crime of passion" before backtracking in a statement to Fox News Digital, saying that this was one of several potential motives being probed by investigators.

Trash is seen outside the house were four University of Idaho students were killed

Parties are frequently hosted at the many student houses on King Road, which was littered with empty alcohol boxes and other items on Monday and Tuesday after the killings. (Derek Shook for Fox News Digital)

Police said they did not believe there was an ongoing risk to the community based on information gathered during the preliminary investigation.

Tuesday, Nov. 15 – Backlash from the community

In another statement, police told the public this was an "isolated, targeted attack, and there is no imminent threat to the community at large."

SLAIN UNIVERSITY OF IDAHO VICTIM'S PARENTS FRUSTRATED BY ‘LACK OF INFORMATION’ FROM POLICE, SCHOOL

Moscow residents, students and victims' families complained about the limited and contradictory information being released by public officials.

Slain University of Idaho student Ethan Chapin and his brother

Ethan Chapin's family is frustrated by the lack of information from the University of Idaho and Moscow police. (Derek Shook for Fox News Digital/Instagram)

Wednesday, Nov. 16 – New details emerge

At a press conference, Moscow Police Chief James Fry revealed to reporters for the first time that there were two female roommates at the home during the horrific attack, and they were unharmed.

UNIVERSITY OF IDAHO MURDERS: THREAT STILL POSSIBLE WITHOUT ANY SUSPECTS IN CUSTODY, POLICE

Fry did not identify the 911 caller or offer an explanation for the call coming in more than eight hours after the slayings. There were no signs of forced entry, he added.

four candles at an Idaho memorial

Candles and flowers are left at a makeshift memorial honoring four slain University of Idaho students outside the Mad Greek restaurant in downtown Moscow, Idaho, on Nov. 15. (AP/ Nicholas Geranios)

He walked back earlier assertions that the crime posed no ongoing danger to the community.

"We do not have a suspect at this time and that individual is still out there," Fry said. "We cannot say there is no threat to the community, and as we have stated, please stay vigilant."

IF IDAHO MURDER VICTIMS ‘WERE GOING TO GO, THEY WERE GOING TO GO TOGETHER,’ FRIEND SAYS

He added that the FBI and the Idaho State Police are assisting in the investigation.

Thursday, Nov. 17 – Coroner releases autopsy findings

The students' cause and manner of death were officially ruled homicide by stabbings in a press release issued by Latah County Coroner Cathy Mabbutt.

Ka-Bar knife inset in front of house where students were murdered.

Police suspect a Ka-Bar-style knife may have been used in the slayings of four University of Idaho students, inset. Caution tape surrounds the house near campus where the students were murdered. (Ka-Bar/Derek Shook for Fox News Digital)

She said the victims were likely ambushed in their sleep with a large knife and each had multiple stab wounds.

IDAHO MURDERS: CORONER WEIGHS IN ON TOXICOLOGY REPORTS, DESCRIBES HER ROLE IN CASE

Some of the victims had defensive wounds, suggesting they awoke during the attack. There were no signs of sexual assault.

Friday, Nov. 18 – Police share aerial map

Police released an aerial map plotting the final movements of the four victims from the evening of Nov. 12 to the time of their murders. Police also asked the public to submit tips and surveillance footage.

Moscow, Idaho, map showing final movements of student murder victims

An aerial map released by the Moscow City Police Department on Nov. 18 shows the final movements of Ethan Chapin, Madison Mogen, Xana Kernodle and Kaylee Goncalves before they were killed in their home on Nov. 13. (City of Moscow Police Department)

Monday, Nov. 21 – Police dismiss potential connection between skinned dog and murders

An Australian shepherd found skinned and filleted three weeks before the killings isn't related to the homicides, police said.

Detectives also revealed for the first time that Goncalves’ dog, Murphy, was inside the home when the students were killed.

Investigators in front of home

Investigators fly a drone over the home in Moscow, Idaho, on Nov. 18, where a quadruple murder took place the previous weekend. (Derek Shook for Fox News Digital)

Tuesday, Nov. 22 – Did Kaylee Goncalves have a stalker?

Police said in a press release that they "pursued hundreds of pieces of information related to this topic and have not been able to identify or verify the identity of a stalker."

Detectives later said they looked into an incident in which a man had followed Goncalves around in a store in mid-October but called it an "isolated incident."

Friday, Nov. 25 – Nearby stabbings unrelated to Moscow quadruple homicide

A 1999 double stabbing in nearby Pullman, Washington, and a 2021 double stabbing in Salem, Oregon, do not appear to be connected to the King Road murders, police said.

Idaho Gov. Brad Little also announced that $1 million in state emergency funds would go toward the ongoing investigation.

Tuesday, Nov. 29 – Vehicles towed from crime scene

Five vehicles were towed from the King Road home to a city lot to be stored. They were previously searched and are "still part of the crime scene," police said. 

Wednesday, Nov. 30 – People cleared as suspects

Hundreds gathered for a vigil at the University of Idaho, and the families of three of the four victims addressed the community in heart-wrenching statements.

Steve Goncalves, Kaylee's father, revealed for the first time that she and Mogen were sleeping in the same bed when they were stabbed to death.

Meanwhile, the lack of a coherent message from public officials sowed further confusion. Latah County prosecutor Bill Thompson said one of the victims was "undoubtedly targeted" in an interview.

IDAHO POLICE APPEAR TO REVERSE COURSE, DO NOT KNOW IF ‘RESIDENCE OR ANY OCCUPANTS WERE SPECIFICALLY TARGETED’

Hours later, the Moscow Police Department called Thompson’s comment a miscommunication and said they had not officially deemed the murders a "targeted" crime, appearing to walk back their earlier assertions.

 The next day, police clarified that they continue to believe the attack was "targeted."

Police also released a list of people they do not believe are involved in the crime: the two surviving roommates; the man in the Grub truck surveillance footage; the driver who took Mogen and Goncalves home; Goncalves’ ex-boyfriend; any individual at the King Road home when the 911 call was made; and the sixth student on the lease who had moved out months earlier.

Monday, Dec. 5 – Victim’s father concerned about police missteps

Steve Goncalves told Fox News Digital that the family was frustrated over the police’s lack of transparency and the progress of the investigation.

"There seems to be confusion everywhere you look," he said of the probe. "It's just absurd the kind of stuff that’s going on right now."

Steve and Kaylee Goncalves pose in front of trees.

Slain Idaho college student Kaylee Goncalves is shown with her father, Steve Goncalves. (Instagram)

Goncalves expressed dismay over how quickly police had cleared many people as suspects and dismissed potential connection to other crimes.

"They’ve messed up a million times," he said of investigators.

Wednesday, Dec. 7 – Police ask for information about vehicle seen near crime scene

Police asked the public for help tracking down a white 2011 to 2013 Hyundai Elantra spotted near the crime scene around the time of the murders. 

IDAHO POLICE HIT WITH DELUGE OF TIPS ABOUT HYUNDAI ELANTRA, NOW FORWARDING CALLS TO FBI CALL CENTER

"Investigators believe the occupant(s) of this vehicle may have critical information to share regarding this case," police said in a statement.

Patrol car parked out front of the home where four University of Idaho students were killed

Police prepare to carry out victims' belongings from the house in Moscow, Idaho, on Dec. 7. (Derek Shooks for Fox News Digital)

Monday, Dec. 12 — Steve Goncalves describes daughter’s injuries, calls police ‘cowards’

In an exclusive interview with Fox News Digital, Steve Goncalves said the victims had "big open gouges" and called police "cowards" for not sharing more with the public.

Goncalves said his daughter's injuries "definitely did not match" Mogen's wounds.

"They may have individually died from the exact same thing, being stabbed, but there are more details," he added. "They're not even close to matching."

FATHER OF SLAIN VICTIM SAYS SHE HAD ‘BIG OPEN WOUNDS,’ CALLS POLICE ‘COWARDS’

On Dec. 12, the Goncalves family, along with their newly hired attorney, Shanon Gray, met with police and other officials in Moscow to share their concerns over missteps in the investigation.

Tuesday, Dec. 13 – Cops pull hours of footage from gas station

Detectives collected eight hours of surveillance video from a gas station in Moscow where a clerk saw a white sedan pass by at 3:45 a.m. on the morning of the murders.

White car moving fast in blurry still from video

A cellphone photo of a computer screen showing a white car on Highway 8 in Moscow, Idaho, around 3:45 a.m. on Nov. 13, according to a clerk who found it while reviewing security footage. (Fox News Digital)

The clerk told Fox News Digital that she had been reviewing the tapes a little bit at a time over the past few days, looking for clues in her downtime.

Police haven't commented on whether the white car is the same Hyundai Elantra they are seeking.

Sunday, Dec. 18 — New video shows two victims with man before murders

A Facebook group dedicated to the Idaho murders exclusively shared haunting surveillance footage with Fox News Digital that showed Goncalves and Mogen hours before they were killed.

IDAHO MURDERS: FULL VIDEO APPEARING TO SHOW KAYLEE GONCALVES AND MADISON MOGEN HOURS BEFORE SLAYINGS RELEASED

The best friends are walking in downtown Moscow with a man who looks like the same student in a hoodie seen in a video moments later standing near them when they ordered pasta from a Grub truck.

The women are discussing someone named Adam, who the Goncalves' family lawyer said is a bartender.

Tuesday, Dec. 27 – Leaked image shows victims inside local bar

A newly leaked image shows Goncalves and Mogen hanging out at the Corner Club bar in downtown Moscow before returning home in the early hours of Nov. 13.

It appears to have been taken by a security camera inside the bar. If the timestamp is accurate, it would have been taken at 1:32 a.m.

Friday, Dec. 30 – Suspect arrested 

Washington State University Ph.D. student Bryan Christopher Kohberger was arrested in eastern Pennsylvania on an Idaho warrant, charging him with four counts of first-degree murder and felony burglary. 

IDAHO MURDER SUSPECT: WHO IS BRYAN CHRISTOPHER KOHBERGER?

Kohberger, 28, was studying at the college's department of criminal justice and criminology in Pullman, Washington — about 8 miles from the King Road home where the victims were knifed to death.

The FBI and local police arrested Kohberger at what appears to be his parents' home in a gated community in Albrightsville, Pennsylvania, according to a police report.

Moscow, Idaho college killings suspect Bryan Christopher Kohberger seen in mugshot

Bryan Kohberger was arrested Friday in eastern Pennsylvania on four counts of first-degree murder for allegedly stabbing to death four University of Idaho college students. (Monroe County (Pa.) Correctional Facility via AP)

A search warrant was executed Friday on Kohberger's Pullman apartment.

At a press conference announcing the break in the case, police said they had recovered a Hyundai Elantra but did not confirm whether it belonged to Kohberger. 

Latah County Prosecutor Bill Thompson said the court documents outlining the details of the crime would remain sealed until Kohberger is extradited to Idaho.

Police also said that plans to clean the King Road home and release the property back to the owner had been halted by a "legal request from the court."

Tuesday, Jan. 3 – Kohberger waives extradition

Idaho murder suspect Bryan Kohberger waived extradition Tuesday in a Pennsylvania courtroom so he could be brought to Moscow to face murder charges for the deaths of four college students. 

Kohberger, 28, entered the Monroe County courtroom in a red jail-issue jumpsuit and looked directly at his parents and sisters who were seated together in the front row of the gallery. 

Bryan Kohberger wears red jumpsuit as he walks into court house

Bryan Christopher Kohberger arrives at the Monroe County Courthouse for his extradition hearing Jan. 3, 2023.   (The Image Direct for Fox News Digital)

Judge Margherita Worthington took her seat at the bench and Kohberger and his attorney Jason LaBar stood up. She asked Kohberger if he waived his right to challenge his arrest on four counts of first-degree murder.

"Yes, I do," he replied, soberly. 

Wednesday, Jan. 4 – Kohberger lands in Washingtion

Kohberger left Wilkes-Barre Scranton International Airport at around 7 a.m. PT Wednesday in a Pennsylvania State Police Pilatus PC-12 single-engine turbo-prop plane, flight records show.

Aircraft with spinning propeller taxis on the tarmac

A plane carrying Bryan Kohberger lands in Pullman, Washington, on Wednesday, January 4, 2023.  (Fox News Digital)

After making two stops, the plane touched down at the Pullman-Moscow Regional Airport 12 hours later, and Kohberger was transported to the Latah County Jail in Moscow, Idaho.

He's scheduled to face a judge Thursday on four counts of first-degree murder and one count of felony burglary. 

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Authorities are asking anyone with information about the murders to contact 208-883-7180 or tipline@ci.moscow.id.us.

Fox News Digital's Haley Chi-Sing contributed to this report.