We know that she was murdered some time between 9 PM and midnight. Stomach contents cannot help narrow down that time frame, because stomach contents are the most unreliable method for determining time of death.
Guede`s timeline would probably help narrow down the time of death. He went clubbing after midnight. Before that, he ran home to change. Before that, he murdered Meredith. Wouldn`t that place the time of death around 11:30.
I guess you are not understanding the irrefutable science that can be used in this.
She had a full stomach consistent of the meal other witnesses ate along with her.
The autopsy revealed this.
It also revealed that she had nothing in her duodenum which is the part after the stomach where your food begins to slowly be broken down into.
To completely empty a meal FROM the stomach it can take anywhere from 3-5 hours. This is simply to empty FROM THE STOMACH.
http://www.vivo.colostate.edu/hbooks/pathphys/digestion/basics/transit.html
I am capitalizing that for effect and hoping you will actually attempt to understand this point.
After it is moving from the stomach and into the small intesting the first part is called the duodenum.
The autopsy revealed NOTHING in her duodenum.
So it takes 3-5 hours to completely empty the stomach while it is slowly being moved into the duodenum.
While in the duodenum (remember hers was completely empty) it is a process that takes another 2-6 hours. the small intestine is pretty damn long.
So do the math, does this tell you anything about having a completely empty duodenum and full stomach?