ALLIANCE, Neb. (AP) — A hearing is postponed for a woman suspected of helping to hide the body of a Denver man in western Nebraska.

Joshua Bullock is believed to have died at the hands of a gunman who was killed in a standoff with police in Alliance in June.

Rose Siefke was to appear in Box Butte County District Court on Thursday. The hearing was delayed after Siefke’s attorney challenged evidence and charges in the case. The issue will be taken up Sept. 26.

Siefke is charged with being an accessory. Investigators believe she helped Andres Gonzalez hide Bullock’s body. Bullock’s pickup was found near Chadron in December. Human remains believed to be Bullock’s were found in June.