(If linking this isn't allowed please let me know!)
From the June 4th Arizona Public Media article
http://www.azpm.org/news/story/2012/6/4/1558-police-on-missing-tucson-girl-there-are-suspects/
...
Right now were at a point where we are following investigative paths that keep us quite busy, Villaseñor says. We think that this was an abduction of some kind, so obviously that infers that there are
suspects that we are looking at, or
people of interest that we're looking at.
...
I read that as, LE are looking at and/or believe that more than one person abducted Isa...not just a single suspect? Or am I reading way too much into it???