I've basically given up on expecting quality journalism outside of dedicated peer reviewed journals, niche publications, and enthusiast websites such as this one.

I bet the "they are cannibals" statement came about because the writer saw a list of possible explanations for the remains in list form:

1. ritualistic burial
2. combat
3. animal activity
4. post-mortem desecration
5. Merlin did it
6. Odin did it
7. Gaia earth mother did it
8. ?cannibals?

and hey, a perfectly researched sensationalistic story is born