This is so, so sad. Poor woman, to lose a life so young is devestating, even more so knowing she was murdered. What those close to her must be going through I cannot imagine.
The sad truth is we may never know what happened to her, all we, and indeed her family, may ever have is speculation. I hope that's not the case though, I hope the truth is uncovered and that the killer is found and sentanced.
The pizza is odd, you would expect to find some remains of it if only the packaging but I suppose she could have been buying it for someone. My sister will often pick something up for me from work and drop it in to me on her way home as she drives past the end of my road.