I don't think there's much we can find, at this point, to identity the man, definitively. There may be a chance, a very small one, that police files, fragments or otherwise, may be found. However, from what we know, based on what the men in charge said in various venues, there was no consensus. Thus, the police probably weren't very much the wiser than we are today. So, in my view, the ship - as they say - has sailed.
I agree. It is highly improbable that official police records will provide any definitive evidence of the identity of the Whitechapel Murderer.
If his identity is ever to be established, it is likely, in my opinion, to be from the family/descendants of the murderer who have information/artifacts that have not yet been made public. Though, I wouldn't bet on that ever happening.
Or maybe, one day, we invent a time machine or time viewer that answers the question for us. This is probably more likely.