The theory which you choose to describe as 'Amaral's' was actually a theory pursued by the official Portuguese investigation into Madeleine McCann's disappearance. It's clearly documented as such in the released files.
You may promote that Amaral was merely the office boy (has to be that 'cos he was such rubbish as a filing clerk) who merely plagiarised the materials for his book and documentary ~ if you want to believe, that is entirely your prerogative.
By the way ~ you do know that Calpol is an analgesic not a sedative.
Anyway, your preferred scenario - as recorded in the files - could be described as negligence and or incompetence.
Amaral's more recent behaviour indicates something other than incompetence.
Who do you think is responsible for telling all and sundry on Saunokonoko's 2019 podcast about the imprisoned German Paedophile he billed as the latest patsy.
Who displayed the 'cartooned' graffitied van.
Who displayed the doctored photograph of the German patsy sporting the long unkempt hippie hair or dreadlocks while almost hysterically impressing on his audience that was Brueckner's look at the time of Madeleine's disappearance.
Amaral did that. All of Amaral's own volition. All while he was a civilian with absolutely no locus in the German investigation into Brueckner which he spent his time since podcastgate2019 doing his level best to disrupt.
What excuse do you have for his behaviour in this one. Who do you think is now giving Amaral his orders.
