and has nothing to do with the mccann case as neither were tortured, next
Torture does not need to happen. There just needs to be an atmosphere of coercion in the investigation process that allows the police to fit up innocent people.
General police behaviour in too many jurisdictions has been based on coerced confession of targeted individuals; this was the case generally in England until PACE limited the opportunities of the police to distort the system. It is not watertight as the case of Barry George and others demonstrate, but most of the tools of coercive policing have been removed. This is not the case in other jurisdictions such as the USA and many European countries and most third world countries that still use coercive investigation techniques.
If the McCanns had not been lawyered up and PR savvy, then I suspect that Kate McCann would have been forced to 'confess' to a minor crime to clear the case up- more important to the police than seeking justice.
The reported bargaining over two years on jail for a lesser crime than murder supports this. As the lawyer said 'if you were Portuguese you would be locked up by now.' Locked up coerced, bullied and demeaned, maybe even accidentally falling downstairs.
Amaral became very frustrated and saw his last chance to detain her because the following week be would have to give reasonable grounds to a court and be knew be did not have them. She was arguidoed and targeted with threats about never seeing her children and offered a way out by serving two years. She stood up to Amaral and the case collapsed.