A father and son from Spokane Valley, accused of a $1.7 million fraud in worldwide sales of wireless smoke detectors, were arraigned Tuesday in U.S. District Court. James "Jimmy" Jensen, 63, and his son, Ryan Jensen, 34, both entered not guilty pleas to a 32-count indictment returned April 24, accusing them of wire and mail fraud, money laundering and conspiracy to violate federal laws.