- The sister of one of the murdered University of Idaho students is urging others to leave the campus.
- "You guys are not safe until this sicko is found," the sister said, referring to the killer who remains on the loose.
The sister of one of four murdered University of Idaho students is urging other classmates to leave campus until the "sicko" killer responsible for the murders is caught by police.
"To the students of the University of Idaho that are still staying around campus, leave," Aubrie Goncalves, the sibling of 21-year-old victim Kaylee Goncalves wrote in an Instagram post on Thursday. "Your grades are severely less important than your lives."
The distraught sister added, "I wish all the students of U of I safety and peace. You guys are not safe until this sicko is found. If the person who did this is capable of killing four innocent people, they are capable of killing more."
Kaylee Goncalves, along with her friends Madison Mogen, 21, Ethan Chapin, 20, and Xana Kernodle, 20, were stabbed to death early Sunday inside an off-campus rental home about one mile away from the Moscow, Idaho, school, police have said.
The four close friends were killed in what authorities have described as an "isolated, targeted attack" after a night out.
In the days after the killings — which have rocked the small town — police stressed that there was "no imminent threat to the community at large," but officials have since walked back that back as the killer remains at large.
"They did nothing wrong, and they took all the precautions they should've, and they were still killed," Aubrie Goncalves said in her post about her sister and her three friends.
"The last thing I want is to have another family experience what I, and my family, is experiencing now. My family and I will constantly strive to do everything in our power to get Kaylee, Maddie, Xana and Ethan the justice they deserve," the sister said, vowing, "I will do everything in my power to help find and put your murderer in prison to rot for the rest of their life."
In the aftermath of the murders, fearful students packed their things and left the campus early before Thanksgiving break.
A University of Idaho spokeswoman told Insider: "While we are not canceling classes in the last few days before Thanksgiving Break, we support the decision of any student choosing to go home early."
"Others have expressed a desire to go to class and be around their peers. Each student should do what is best for them at this time," the spokeswoman said.
Meanwhile, a local coroner said the students' cause of death was homicide and that they were stabbed to death.
Latah County Coroner Cathy Mabbutt said that the were all killed with a "bigger knife" and stabbed multiple times. The murder weapon has not been found.
"It's pretty traumatic when there's four dead college students who have been stabbed to death in one location," Mabbutt said during an interview with NBC News.