A better question would be, how did all those clothes get off of her and away from the body? More likely they were never on it in the first place, just dumped somewhere near it to make it look like an attack on a jogger.
This body was dumped there, Chandra would never have gone back in that area with anybody, not Gary, not at all, in her life time.
I tend to agree. Why would she be scouting a new and unfamiliar jogging trail, when she was preparing to leave the area?