There's some key facts missing from that article, and things that have been reported differently elsewhere. For example, the story goes the bawss of that gran fondo (none other than Fernando Escartín) personally allowed Ángel Vázquez to compete on condition that he wouldn't contest the "win". Vázquez agreed but then raced for the "win" anyway, and then the organizers tried to convince him to allow himself to be caught, or to withdraw. Vázquez told them he wouldn't stop, but simply wouldn't cross the finish line. That's when the organizers decided to force Vázquez to stop by asking the Guardia Civil to intervene.
How they missed Escartín's role in all of this, I do not know.