Suspect Arrested in Killings of 4 People Inside North Dakota Business

A 44-year-old North Dakota man was charged with four counts of murder Thursday in the death of four people whose bodies were found Monday inside a Mandan business.

The Mandan Police Department responded to a 911 call on Monday and discovered the bodies of three men and one woman inside RJR Maintenance & Management, a property management company.

“They suffered stab wounds and/or gun shot wounds,” Mandan Police Chief Jason Ziegler said during a press conference Thursday night.

In the days following the discovery, investigators asked the public to call a hotline with any information related to the case.

As calls came in, law enforcement watched hours of surveillance video and quickly identified the suspect’s vehicle and began searching.

On Thursday, the suspect’s vehicle was spotted in neighboring Washburn, where he was stopped for a traffic violation, Ziegler said.

Chad Isaak | AP/REX/Shutterstock
Chad Isaak | AP/REX/Shutterstock

• Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.

A warrant was issued and law enforcement discovered evidence on the suspect and in the vehicle, Zeigler said during the press conference.

Police arrested Chad Isaak, from Washburn, North Dakota. He was charged with four counts of felony murder, police said. It was unclear when he would make a first appearance in front of a judge, and it was unclear whether he obtained an attorney.

RELATED: Victims Killed at North Dakota Business Identified, but Suspect Remains at Large

During the press conference, Zeigler confirmed Isaak was a tenant at a property managed by the management company, but he wouldn’t release any additional connections between the suspect and the crime scene.

“At the present time, a motive for the crime is unknown,” Zeigler said.

Law enforcement released the identities of the four people. They are RJR co-owner Robert Fakler, 52; employee Adam Fuehrer, 42; and married co-workers William Cobb, 50, and Lois Cobb, 45.

It was not immediately clear if Isaak has entered a plea or retained a lawyer who could comment on his behalf.