Thank you for this article, and please ping me to any more threads.
I wonder if the killer is Basque.
I don’t have any evidence at all to support this. It is just that those towns are all stamping grounds for Basque militants. And a Basque can always rely upon the suppport of their own community, no matter what they might have done. They melt back into their border villages, and sometimes cross the border to Spain.
Done!
I thought of a possible Basque connection myself.