Who Is Chad Isaak? Navy Veteran Found Guilty of 4 Murders in North Dakota

The perpetrator of one of the most gruesome murders in North Dakota history was found guilty Friday of killing four people at a property management firm in 2019, the Associated Press reported.

Jurors found Chad Isaak, a chiropractor and Navy veteran, guilty on all counts in the April 1, 2019, deaths of RJR Maintenance & Management co-owner Robert Fakler, 52, and employees Adam Fuehrer, 42, Bill Cobb, 50, and Cobb's wife, Lois Cobb.

Defense attorney Bruce Quick acknowledged in his opening statement that the massacre was exceptionally heinous and one of the worst the state has seen. Isaak shot and stabbed three of the victims at the Mandan-based business, and the victims were collectively stabbed about 100 times.

The 47-year-old Isaak's mobile home was on property managed by the firm. He pleaded not guilty to four counts of murder and three other counts and now faces life in prison without parole.

For more reporting from the Associated Press, see below.

ND Federal Courthouse
Chad Isaak, the perpetrator of one of the most gruesome murders in North Dakota history, was found guilty Friday of killing four people at a property management firm in 2019. Above, a courtroom in the federal building and courthouse in Fargo, North Dakota. Carol M. Highsmith/Buyenlarge/Getty Images

Isaak, in handcuffs, looked down before the verdicts were read but showed little emotion as the jury's decision on each count was announced.

A jury of six men and six women deliberated four and a half hours before finding Isaak guilty following the three-week trial.

Judge David Reich did not immediately schedule a date for sentencing.

Quick said during the trial that the case amounted to a rush to judgment based on bad information that led to the wrong conclusion. The defense rested its case Wednesday.

Prosecutor Karlei Neufeld described the horrific crime scene during the trial and said evidence that included photos, surveillance video, bullet fragments, a knife and other items found during searches of Isaak's home and vehicle led to the charges against him.

Prosecutors presented the case as a puzzle in which all of the pieces pointed to Isaak, including a knife found in his clothes washer, gun parts found in his freezer and security camera footage tracking his pickup.

BCI Supervisory Special Agent Arnie Rummel testified that investigators were not able to determine a motive, but that a motive isn't a requirement for conviction.

The defense maintained that authorities overlooked numerous possible alternative suspects. Isaak's attorneys also questioned the sourcing, collection and processing of evidence; said some testimony doesn't match police reports; and questioned the absence of visible blood on the clothing of a person seen in security camera footage leaving RJR the morning of the killings.

Prosecutors showed security camera footage from numerous businesses that authorities said tracked Isaak's white pickup from Mandan to Washburn on the day of the slayings, along with footage from a week earlier that they said indicated the killer planned out the attack.

Forensic experts testified that fibers on the clothing of the slain workers were matches for fibers taken from Isaak's clothing, and that DNA evidence found in Isaak's pickup truck was linked to Fakler and possibly Lois Cobb.