Police have yet to identify a motive for the killings.

The trial for a man accused of killing four people at a North Dakota property management company has been pushed back six months after attorneys requested more time to review evidence and prepare for the case.
The trial for Chad Isaak will begin Sept 14. in Morton County. South Central District Judge Gail Hagerty set aside 10 days for the trial.
The 45-year-old chiropractor is charged with four counts of murder in the deaths of RJR Maintenance and Management co-owner Robert Fakler and employees Adam Fuehrer and Bill and Lois Cobb, who were married. The four were found shot and stabbed April 1 at the Mandan business.
The Bismarck Tribune reports the Morton County State's Attorney office and defense attorney Robert Quick signed a stipulation to continue the trial, stating that it's necessary "due to the excessive amount of discovery in this matter."
Isaak has been jailed on $1 million bond since his arrest a few days after the killings. He lived in a mobile home park managed by the company, but police have not identified a potential motive in the deaths. Search warrants and receipts filed in the case show investigators have scanned Isaak's bank and phone records, his home, office and vehicle and the Facebook accounts of the victims.