One of the men accused of murdering 38-year-old Andrew “Drew” Nichols, pleaded guilty to conspiracy to commit murder and concealing the death of another Thursday, just days before his trial was scheduled to begin. Robert Vincent Lambert, 38, is one of four men accused of torturing and murdering Nichols, whose partially buried body was found in late 2009. He was initially charged with murder, concealing the death of another, aggravated battery, possession of arms by a convicted felon, possession of firearms or knife while trying to commit crimes, kidnapping, aggravated assault, probation