DECORAH, Iowa (AP) — A December trial has been scheduled for an 18-year-old man accused of helping to fatally beat a Decorah resident. Winneshiek County court records say Dalton Adam has pleaded not guilty to a charge of first-degree murder. His trial is set to begin Dec. 12. Prosecutors say Adam and a 17-year-old boy attacked 46-year-old David Hansen after Hansen confronted the pair as they damaged property outside his home on July 12. He died Aug. 30.