If one good thing has come out of the lamentable mistake made by French police the other day accusing five Catalan firefighters of being members of ETA, it is that at least a few sections of the Spanish media have had to think about the way they go about their work. The video footage of the firefighters doing a bit of shopping in a supermarket near to where ETA killed a French policeman was passed to the Spanish authorities who promptly paid no attention to any concept of presumed innocence and circulated it to the Spanish media as being film of wanted ETA members.
That doesn't excuse the fact that much of the media then did the same thing. The mistake was disguised a bit for those who live in the larger Spanish cities as the revelation that those appearing on the video had been recognised by their families back home managed to reach some newspapers in time for them to change their second editions. The first editions had been in no doubt that the video showed dangerous terrorists. El País even had a police "expert" who assured the paper that the five firefighters were either ETA members or policemen - no other option was possible. The press soon had to change their tune, although on the whole they did so without recognising their own contribution to identifying the innocent as terrorists.
It's a frequent problem involving terrorism, with headlines proclaiming the capture of an "Etarra", whilst the subsequent release without charges of the same person may not even be reported at all. The presumption of innocence only seems to come into play for politicians and priests. It's not just terrorist suspects who might be affected, a few months ago the paper ABC carried an atrocious front page that accused an innocent person of being the killer of a small child. The paper's editor later had to publicly apologise for that one but the damage was already done, and probably sales increased that day.