The blood tracks (spoiler inside)

[wtcelesta]

Where I found Catherine's body, there is a blood track that goes from the payload pickup door all the way to the room where the body is found. The wrench with which Catherine was hit is on the floor in that same room though. Help me understand. If she was hit in that room, how come there are blood tracks? If she was hit at the payload pickup door and someone dragged her to her final rest (why would they do that?), why also bring the wrench? All the evidence is that she couldn't possibly crawl, injured and dying, from one place to another, because the dialog that Simon hears before her death is too short and her death appears to be almost instant. What is going on with that? Very curious.[/php]