TERRELL - Former Kaufman County District Attorney Louis "Bill" Conradt Jr. killed himself as police tried to serve an arrest warrant for soliciting sex with a minor, authorities said.Conradt, 56, was chief felony assistant attorney for nearby Rockwall County at the time of his death Sunday.Police forced their way into Conradt's Terrell home after hearing a gunshot when he refused to answer the door, a police spokesman said. The officers found Conradt with a self-inflicted gunshot wound. He later died at a hospital in Dallas, about 30 miles west of Terrell.Police in the town of Murphy in nearby Collin County...