Actually, this is one thing that has bugged me. Wouldn't have Chandra gone outside at all on other occasions the last few days before she vanished? I mean, just going down the corner for a latte or something. I don't know if I trust the police dogs here, well more specifically their trainers. They probably led the dogs all the way downstairs and the dogs smelled nothing outside because it was over a week later and her scent had vanished.
As much as I think it's possible she got into a car or cab that day... I find that because they found no other trace of her at all outside means her scent had vanished through time.
I might do some research on that tonight. How long would somebody's scent remain on a sidewalk anyways. It was well over a week later that the dogs were used.
Pretty impressive! Now I know all dogs aren't as good as this one, but I don't get the impression Chandra ran around near her home. She seemed to be pretty reclusive except for Condit. I also don't remember how she got to work and home. It would have been too far to walk I would think and I don't remember her having a car.
But the scent was on the sidewalk. The dogs only lost her scent at the curb. To me, this means there may have been street cleaning in the interim. All that water and biodegradable disinfectant, all that rotary brush action. That could explain it -- just as stepping into a car could also explain it.