The 72-year-old victim of a sordid murder called western Nevada County home for much of his career in the U.S. Forest Service. Robert Harris, who was living in Placerville, was allegedly killed by a 12-gauge shotgun blast fired by his ex-wife, Colleen Ann Harris, 70. Colleen Harris, who was being held in an El Dorado County without bail, according to the Associated Press, has faced murder charges before. In 1985, Colleen Harris was accused of killing her then-husband, 46-year-old James Batten, but was later acquitted by a jury, which was convinced by the defense’s argument that Colleen Harris committed the …