bbm
Ita.
Yes I'd mentioned injuries and they could be worse than what we know so far.
If she punched him and broke his nose or if he had a head wound, there'd be heavy bleeding and sadly
she still made him walk to that truck. 
Also wondering about the earlier posts alluding to internal injuries and vomiting.
Sad and graphic warning :
Food partially digested wouldn't be as hard to clean up as blood from internal injuries.
And forensics will be able to determine if it was blood from a nose/head wound or internal from the liver or other areas.
There seemed to be specific items they were looking for in the house searches.
I'm also wondering if there's any photos/videos on her phone that she tried to delete and were recovered ?