MANDAN, N.D. — The amount of preparation involved for the trial of a man accused of killing four people at RJR Maintenance & Management in Mandan last spring has prompted attorneys to request that the case be continued from March to September next year.

Documents filed Monday, Dec. 2, show the trial for Chad Isaak, 45, will start Sept. 14 in Morton County. South Central District Judge Gail Hagerty set aside 10 days for the trial.

Assistant Morton County State’s Attorney 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.” "Discovery" is a legal term referring to evidence exchanged by attorneys on opposite sides of a case.

Hagerty, who recently announced her resignation effective in March, has assigned the case to Judge James Hill.

Isaak is charged with four counts of murder in the deaths of RJR 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 business off Memorial Highway in Mandan. A motive is unknown.

Isaak has pleaded not guilty. He is being held in the Burleigh Morton Detention Center in lieu of $1 million bail. He was arrested in Washburn, where he operated a chiropractic clinic, a few days after the slayings. The North Dakota Board of Chiropractic Examiners recently suspended his license pending the outcome of the case.

Isaak has requested a change of venue for the trial because of news coverage about the case. He also has challenged the legality of police search warrants in the investigation. The Dec. 19 hearing originally set for those matters will now be held Jan. 6.