Drew Peterson is being held on $20 million bond after being arrested Thursday and charged with two counts of first-degree murder in the drowning death of his third wife. The arrest is the biggest development yet in the case against the former Chicago-area police sergeant — who launched into the national spotlight after the suspicious disappearance in October 2007 of his fourth wife, Stacy Peterson. Peterson hasn't been charged in Stacy Peterson's disappearance but now faces charges that he killed Kathleen Savio, his third wife, who was found at home dead in a dry bathtub on March 1, 2004. Illinois...