Bryan Kohberger, 28, was arrested after Christmas in Pennsylvania’s Pocono Mountains. He was arrested in connection to the murder of the 4 University of Idaho students.

Investigators on the case told ABC News that police identified Kohberger as a suspect, at least in part, by using DNA technology, and police then tracked him to Pennsylvania through his car. They expect no more arrests.

What Do We Know About Bryan?

Bryan Kohberger is a graduate student at Washington State University, located less than 10 miles away from the University of Idaho. He is a Ph.D. student in the department of criminal justice and criminology. He completed his first semester in its criminal justice program earlier this month; the university confirmed to ABC News. law enforcement officials have executed a search warrant suspect’s apartment and office, which are both on the university’s campus.

Arrest paperwork filed by Pennsylvania State Police in Monroe County Court, on Dec. 30, 2022, said Kohberger is being held for extradition in a criminal homicide investigation based on an active arrest warrant for first-degree murder issued by the Moscow Police Department and Latah County Prosecutor’s Office.

Sources said the Federal Bureau of Investigation had been watching the house for several days before a specialized team of Pennsylvania State Troopers and FBI federal agents moved in around 2 a.m. Friday.

Police did not disclose a motive or what led them to their suspect. The probable cause affidavit, which details the reasons for Kohberger’s arrest, is sealed and cannot be released to the media until he returns to Idaho.

Kohberger was arrested on four counts of first-degree murder and burglary. Kohberger appeared before a judge in Pennsylvania Friday morning and is being held without bond. He is scheduled to return to court in Pennsylvania on Tuesday, January 3rd, to begin the extradition process and has been appointed a public defender, as per his constitutional rights.

The murder weapon has not yet been recovered.