Attorney for man accused of killing 4 in Mandan says 'case is a rush to judgement' Investigators did not find Chad Trolon Isaak's DNA in any of the samples taken from RJR Maintenance, nor on any of the victims, a defense attorney said. None of the four victims' DNA was found in Isaak's residence, including knives and clothes found in his mobile home. 1:50 pm, Aug. 4, 2021 × Chad Isaak of Washburn sits with his defense team Wednesday during the third day of his murder trial at the Morton County Courthouse in Mandan. Isaak is on trial for the killing of four people at RJ...