Investigators arrest man in connection with Monday's quadruple homicide

Published: Apr. 4, 2019 at 6:29 PM CDT
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Investigators have arrested 44 year old Chad Isaak on suspicion of killing four people in Mandan on Monday.

Authorities say Isaak faces four counts of AA felony murder.

Mandan Police Chief Jason Ziegler says the four victims had been stabbed and shot.

Officials stopped Isaak during a traffic stop in Washburn, ND and say evidence in the vehicle and on Isaak prompted them to arrest him.

Police Chief Ziegler says the motive for the killings is still unknown.

UPDATE: Mandan Police have told Valley News Live they plan to hold a press conference on recent developments in the quadruple homicide investigation around 9 p.m. Thursday. The conference will be at Mandan's city hall.

A man was detained in front of the Captain's Cabin along the highway in Washburn, North Dakota. That's about 45 miles north of Bismarck. It was a traffic stop by a McClean County Sheriff's Office.

Tune in to Valley News Live at 9 on the Fargo CW as we will bring you the conference live on air. You can also watch the press conference on our website, and on our Facebook page.

Stick with Valley News Live as this story develops.

ORIGINAL: Mandan Police, along with the assistance of the North Dakota Bureau of Criminal Investigation and the McLean County Sheriff’s Office are following up on a lead that led investigators to Washburn. A person of interest has been detained. This is an ongoing investigation. We will continue to update with further developments as this progresses into the evening.