Albertini, you really do have this ar.. about face.
The relevant question is "What firm and verified evidence exists that makes it apparent they were involved"
You seem to be living in some sort of weird parallel universe where the onus is on "suspects" to prove their innocence. And you do seem to have a lot invested in trying to convince a bunch of forum members of this.
I couldn't care less whether people believe it or not. It's one of the mysteries of debating the McCann case online, the lengths people will go to defend their pre conceived ideas about the involvement of the parents.
For the umpteenth time, in an investigation, those people who have the scope and means to be involved in a crime have to prove their innocence to the police to be ruled out as suspects.
That is not the same position or statement about a court case where a defendent is innocent until proven guilty.
Although as we have seen in the Barry George case even courts seem to indicate there are degrees of innocence.
Now if you can not or will not understand the difference between a police investigation and a criminal trial then i cannot help you.
But once you do understand that difference and if you have an open mind, it is clear what i am saying.