She was being stalked by someone while she was walking back and forth doing her laundry. If she did have to walk down the street to a gas station in order to get change for the washer, that could have been the fatal mistake.
It gave her abductor just enough distance from the apartments to do a snatch-n-grab and hustle her off into the dark without anyone seeing or hearing anything. It is entirely possible it could be someone that lives there as well as a transient that lives somewhere around there.
Judging by the pictures we saw yesterday of the torn tent and all the rubbish strewn around everywhere, it gives you the impression that it could be a transient. That however, may be the EXACT impression said perpetrator may have wanted to leave.