A teacher arrested in the murder of a married couple found stabbed to death on a trail in an Arkansas park was held without bond after a brief court appearance on Friday. Andrew James McGann, 28, of Springdale, Arkansas, entered a not guilty plea and was appointed a public defender, according to Little Rock ABC affiliate KATV. He's set to return to court on Aug. 25. McGann is charged with two counts of capital murder in the killings of 43-year-old Clinton David Brink and his wife, 41-year-old