This reminds me of the wonderful
Proofs of P article.
"Zabludowski has insinuated that my thesis that p is false, on the basis of alleged counterexamples. But these so- called "counterexamples" depend on construing my thesis that p in a way that it was obviously not intended -- for I intended my thesis to have no counterexamples. Therefore p."
I can only respond to what you actually post, not to a different and unfalsifiable argument that you wish you posted.
In any case the point remains uncontested that the police did try to identify clothes Amanda and Raffaele might have been wearing and disposed of and failed to find any that could not be accounted for. That does not make it impossible for them to be guilty, but it's one more piece of evidence that should be there and is not.
"Special pleading" is not a term you wheel out every time that someone you are debating with differentiates between two things that are actually different. You have to establish that the other person has claimed a general rule, and then made up a special exception to that rule.
It's a slam-dunk that Rudy had time to dispose of his bloody clothes and knife - he had two weeks during which he was unaccounted for and unsought, travelling over a large distance. Those items could have been dumped in garbage bins all over Italy.
Amanda and Raffaele would have faced substantially greater problems. They were in Perugia, if they were seen disposing of clothing or knives they would have been screwed, the area around the murder scene and their houses would doubtless have been searched, their wardrobes were inventoried with a view to establishing if anything was missing, and yet absolutely no evidence has ever emerged that they disposed of a single shirt or shoe.
These two cases are substantially different. However you are free to try to state what general rule I am arguing for and what special exemption I am pleading for.
Yet again we have a pro-guilt poster who seems to think that gloves are stapled on... you are aware, are you not, that gloves are removable? And that people do remove them do do things like wipe their backsides, get clothing off an unwilling person or use a knife (depending on the glove it can be quite awkward to try to cut things with gloves on as I have discovered while camping).
There is no direct evidence that Rudy wore gloves - it's just an uncontroversial hypothesis that fits the available facts and is consistent with what burglars do.
For that matter there's no direct evidence Rudy did not wear gloves. This is why I consider the "Rudy left no DNA or fingerprints in Filomena's room, therefore the break-in was staged" particularly weak - it relies absolutely on the convenient assumption that Rudy did
not wear gloves, and was completely unaware that it might be a bad idea for a housebreaker to rummage through people's stuff ungloved.