I just want to point out here that the only time, that I am aware of, that it was mentioned the mother went to work at 7:30 AM came out during the Nancy Grace show, when she interviewed "Sergeant Maria Hawke, the PIO of the Tucson PD."
GRACE: Sergeant Hawke, what time -- what time did the mom go to work that morning?
HAWKE: It`s my understanding that she left for work at approximately 7:30 in the morning.
http://transcripts.cnn.com/TRANSCRIPTS/1204/23/ng.01.html
I recall being really surprised to hear this especially since LE over the many press conference they had from this onset of this case would NOT state the time.
Then the other day, when the Vice President of the Medical Center spoke to ABC indicating that the mother was at work VERY early that morning.
VIDEO mark ~1:50
http://abcnews.go.com/GMA/video/missing-tucson-girl-fbi-steps-involvement-isabel-celis-16208983
and now with the neighbor's dog as well as the Celis' dogs barking is making my head hurt wanting to know the accurate time the mother went to work that day.