In general, the Castilian model was parallel to the initial model of Islamic Spain.
In the wake of the first decree, more thanJews were forced to leave Spain. Of those permanently expelled, the majority finally settled in the Maghreb or the Barbary coast. Forced conversion of minorities was against the law, and so was the belief in the existence of witchcraft, oracles or similar superstitions.
After the formal accusation, the inquisition gave the suspect an advocate. Originally, the Inquisition was to ensure that those who had converted to Catholicism from Judaism or Islam had done so properly.
As such, those who self-identified as Christians could be investigated and trialed by it.
Heretics who refused to confess were burned at the stake. Ferdinand reasonably feared that he would not be capable of repelling an Ottoman attack to Spain's shores, especially if the Ottomans had internal help. After years of what boiled down to the frantic pointing of fingers, the Spanish Inquisition drew to a close in From this time, the Spanish Inquisition was less dependent on Rome and more dependent on the monarchy.
It could call on a veritable army of familiares, or lay officials, who supplied information and aided the Inquisition in various ways.