Bryan Christopher Kohberger, 28, was arrested early Friday morning by the Pennsylvania State Police at a home in Chestnuthill Township, authorities announced. He is being held for extradition to Idaho on a warrant for first degree murder, according to arrest paperwork filed in Monroe County Court.

Latah County prosecutor Bill Thompson confirmed in the Friday press conference that a criminal complaint was filed against Kohberger with four counts of murder and other charges in connection to the case. An affidavit has been sealed until Kohberger returns to Idaho to be served with a warrant, Thompson said.

The prosecutor said that Kohberger is being held without bond in Pennsylvania, also confirming earlier reports that he was a graduate student at Washington State University. In the news conference, few details were given about the suspect, including a possible motive.

"Once he gets here, he will have an initial appearance with a magistrate," Thompson said.

Earlier Friday, a mugshot of Kohberger was released to various news outlets by the Monroe County Correctional Facility in Stroudsburg, Pennsylvania. Reports indicated that he was arrested near the Pocono Mountains in northeastern Pennsylvania

Kohberger graduated from Northampton Community College in Pennsylvania with an associate of arts degree in psychology in 2018, according to college spokesperson Mia Rossi-Marino. A Ph.D. student by the same name is listed in the Department of Criminal Justice and Criminology at Washington State University, which is a short drive across the state line from the University of Idaho.