LE MARS, Iowa (AP) – A December trial has been scheduled for a northwest Iowa man accused of stabbing to death his sister. Court records say an attorney for 33-year-old Thomas Bibler entered not guilty pleas Friday to murder and related charges. Bibler’s trial is set to begin Dec. 13th. He was arrested June 11 after a short standoff at his Le Mars apartment. He’s accused of fatally stabbing 27-year-old Shannon Bogh at her Le Mars home.