Barcelona's former club president Josep Bartomeu was arrested on Monday
He is being investigated by Spanish police over an alleged smear campaign
It is claimed that he was involved in a campaign to tarnish reputations of past and present players who were speaking out against him during his presidency
Barcelona's CEO Oscar Grau, head of legal services Roman Gomez Ponti and Jaume Masferrer, who acted as an adviser to Bartomeu, have also been arrested