The muder takes place on August 11th in the text. I've found the murder, but haven't been able to find a name for the woman. I will continue to look.
Allen Kane knocked sharply on the door of the double-wide, and in a few moments it opened. "Good morning, Ma'am," Allen said as he suppressed an involuntary grimace. "My name's Wade. The Director sent me to speak with you." He held out the credentials of an ATF agent he had killed two days before. The woman peered at them momentarily through her thick glasses. Then she opened the aluminum screen door and ushered Allen Kane into the drab surroundings.