They know where she was before she disappeared.
She was at a party and later at an apartment complex blocks away. A surveillance camera caught her outside a pub, where she was turned away. She was seen running past a gas station at one point and later spotted at a restaurant. At another point, she had drinks with a man at a bar.
http://myfox8.com/2014/09/28/where-is-university-of-virginia-student-hannah-graham/
“They know where she was before she disappeared.”
You are missing the point.. If the phone trail is tracked, as I am sure it was, the police may have a known location for the cell phone AFTER the girl was last seen in a bar or on a store camera. And the location of the phone was most certainly close to where the missing student was at the same time. My specific question would be, where was the phone’s last known location? If the phone were destroyed outside of town, it might indicate a direction the abducted girl was traveling in. I would think the police would share this information to help the public focus on the search.
Seems that she was living dangerously to go out by herself and hit the bars — or at least try to. I wonder why.