Bryan Kohberger is wearing a suicide-prevention vest while being held at the Monroe County Correctional Facility in Pennsylvania following his arrest in conjunction with a quadruple homicide in Moscow, Idaho, WHD News confirmed Saturday with a law enforcement source.

Suicide vests are used to "ensure warmth and comfort" while not obstructing the wearer's movements, according to PSP Corp, a suicide prevention company. 

The vests also cannot be rolled or torn and prevent inmates "from using the fabric to create a weapon or hanging mechanism."

This photo provided by Monroe County (Pa.) Correctional Facility shows Bryan Kohberger.  (Monroe County (Pa.) Correctional Facility via WHD)

IDAHO MURDERS: SUSPECT BRYAN CHRISTOPHER KOHBERGER ARRESTED IN KILLINGS OF 4 UNIVERSITY STUDENTS

Kohberger, 28, was arrested Friday for the Nov. 13 murder of four University of Idaho students while at his parents' home in eastern Pennsylvania.

Authorities used DNA to track him and his vehicle that was placed at the scene of the crime, a separate source told WHD News. 

He has been charged with four counts of murder and burglary for the alleged stabbing of Ethan Chapin, 20, Xana Kernodle, 20, Kaylee Goncalves, 21, and Madison Mogen, 21.

WHD News confirmed through a police source that investigators have only been focused on Kohberger as their suspect "the last few days."

Genetic genealogy work on DNA left at the scene of the crime was instrumental in leading them to Kohberger, WHD News was told. 

The Moscow police faced criticism for the time it took investigators to locate a suspect or persons of interest as questions remained unanswered for roughly a month and a half.

Ethan Chapin, 20, Xana Kernodle, 20, Madison Mogen, 21, and Kaylee Goncalves, 21, along with the women's two other roommates in Kaylee Goncalves' final Instagram post, shared the day before the slayings. (@kayleegoncalves/Instagram)

UNIVERSITY OF IDAHO MURDERS TIMELINE: WHAT WE KNOW

The local police worked with the FBI and Idaho State Police throughout the investigation.

In an interview with WHD News Saturday, Moscow Police Chief James Fry described the process as a "puzzle."

"We're building the picture, and we're putting those pieces to get that picture," he said. 

Fry said the department "truly believe[s] we have the individual that committed these crimes."

Kohberger’s connection to the victims – if any – remains unknown.

Police search a home in Moscow, Idaho on Monday, November 14, 2022, where four University of Idaho students were killed over the weekend in an apparent quadruple homicide. The victims are Ethan Chapin, 20, of Conway, Washington; Madison Mogen, 21, of Coeur d'Alene, Idaho; Xana Kernodle, 20, of Avondale, Idaho; and Kaylee Goncalves, 21, of Rathdrum, Idaho. (Derek Shook for WHD News Digital)

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"That's part of that investigation that we're still putting pieces together," he added. 

Kohberger was a Ph.D. student studying criminal justice at Washington State University in Pullman – roughly 15 miles from the victims' shared rental home.