I don't know if they had anything to do with it or not. What I do know is that their evidence and behaviour has led many people, including the PJ, to have doubts about them.
The Amaral investigation may have had their doubts which propelled them into declaring them formal suspects in the days prior to a change in the law which would not have allowed such an action without supporting evidence ... which as we have seen did not exist.
The Rebelo team relied on what evidence there was which when presented to the public prosecutors led to the case being archived and the arguido status - which should never have been imposed in the first instance - being lifted.
Proper interpretation of the forensic results sent from the FSS being paramount in this.
What exactly do you mean by "behaviour"??? Are you basing your assessment of this on the opinion of the 'body language experts' on Portuguese television etc making capital out of which ear Gerry scratched or Kate not crying to suit or shedding a tear on cue?