A trial for a Cedar Rapids man, charged with killing a mother of three in April, has been set for October 15 in Linn County District Court.Timothy Evans, 38, pleaded not guilty in a written arraignment to first-degree murder, first-degree robbery, first-degree burglary and first-degree arson in the fatal assault of Gina Frederiksen, 38, of Cedar Rapids.In what police called a “random act,” Evans broke into her detached garage about 7:34 a.m.