Columbus did not allow Castanheira to come aboard, and Castanheira announced that he did not believe or care who Columbus said he was, especially if he was indeed from Spain. After two days, Castanheira released the prisoners, having been unable to get confessions from them, and having been unable to capture his real target, Columbus.
Columbus refused to allow Castanheira to participate in his expedition, and Castanheira stated that he didn't trust Columbus' claims of identity, especially if they were genuine and Spanish. Two days passed before Castanheira set the prisoners free, having failed to extract information from them and unable to capture his actual goal, Columbus.