Prosecutors have confirmed that they will be seeking the death penalty against Bryan Kohberger, who is accused of murdering four university students in Moscow, Idaho.
Kohberger, 28, is currently facing four counts of first-degree murder and one count of felony burglary after four students were killed at their home off-campus last November.
Kaylee Goncalves and Madison Mogen, both 21, and Xana Kernodle and Ethan Chapin, both 20, were stabbed to death in the late-night attack on November 13, while two others in the home were unharmed.
Following a six-week manhunt, Kohberger was arrested on suspicion of the murders, but a judge entered a "not guilty" plea on his behalf in May after he chose to "stand silent" in court.
In a new court filing, prosecutors wrote: "Considering all evidence currently known to the State, the State is compelled to file this notice of intent to seek the death penalty."
Top prosecutor Bill Thompson added that the case met the standard for the death penalty as the acts were "especially heinous, atrocious or cruel" and "exhibited utter disregard for human life".
The statement read: "The State gives this notice based on the fact that it has not identified or been provided with any mitigating circumstances sufficient to prohibit the triers of fact from considering all penalties authorized by the Idaho legislature including the possibility of a capital sentence.
"Consequently, considering all evidence currently known to the State, the State is compelled to file this notice of intent to seek the death penalty."
Investigators revealed that DNA had been found on a "leather knife sheath" at the scene and documents which were unsealed in January showed that police collected a knife, Glock pistol, black gloves, a black hat, and a black face mask while searching Kohberger's home.
Police also seized his white 2015 Hyundai Elantra, which eyewitnesses had claimed to see in the area around the time, and dismantled the vehicle.
Kohberger's attorney has criticized the prosecution for relying on investigative genetic genealogy - which is when DNA from crime scenes is used to identify suspects through other genetic DNA profiles or matches - calling it a "bizarrely complex DNA tree experiment".
According to the prosecution, the FBI went to public DNA sites to match the results found on the knife sheath, allowing them to hone in on Kohberger as the main suspect.
Kohberger had been studying for a PhD in criminology at Washington State University, just eight miles across the Idaho/Washington border from Moscow, where the murders took place.
Following the news that the death penalty would be sought, Goncalves' family said they were "grateful" for the decision, adding in a statement: "We continue to pray for all the victims families and appreciate all the support we have received."
Kohberger's trial is due to begin on October 2.