A hearing on whether the alleged confession by the man accused of killing Mollie Tibbetts can be used as evidence has been delayed.  The attorneys for Cristhian Bahena Rivera asked for the delay, saying more time is needed to prepare and receive a new report from an expert witness.  Bahena Rivera is charged with first degree murder in the death of 20-year-old Mollie Tibbetts of Brooklyn in July of last year.  That hearing will now be held October 22 and 23.  Bahena Rivera’s trial is scheduled for November 12 in Sioux City.