It’s impossible to say, but you very well may be right.
Personally, I think all the answers lie with the man currently behind bars. I’m optimistic for a break, but pessimistic in regards to what that break will mean for Vanessa.
The crime seems to have been emotional, on account of the brutal violence that was inflicted. The post offense actions seem to indicate panic, in that putting bloody items in a donation bin is incredibly stupid.
My fear is that this was part of a pattern, one that culminated with Vanessa’s death. If she was alive, I think she would have been recovered by now.
I think this is likely to have been a double homicide.