what does "discount that avenue"mean?
What his grandmother remembered changed things. Not the intruder—he’d already believed there was one on the night she fell. But the location. She’d described seeing someone upstairs, then running down, or trying to. Not someone on the main floor, someone who had come up from the basement.
That left three options.
His grandmother’s mind was confused. Possible, of course, given the trauma she’d suffered. But he didn’t think so.
It was also possible they were dealing with two different intruders, either connected or completely separate. He couldn’t and wouldn’t discount that avenue.