Shadows of Europe has a chapter on Spain and Euskal Herria (Basque Country). EH is more meta and cyber-friendly than anywhere in Spain.
Vice has a paragraph or so on Unione Corse, the Corsican Mafia, going right into OC in Spain. Organized crime is also discussed at some length in SoE—a subchapter in the beginning and discussions for each country's chapter.
Really, I figure if he's Spanish (or Basque) he would be a member of a local Mafia family and not Corsican. If he's Corsican, then that's that and he spent time in Spain. In which case he could have lived pretty much anywhere.