The reason this is all going round in circles is you cannot build an evidential case this way.
Profiling is an investigatory tool. If you actually charge a case then you can use the exceptions to the rules against similar fact evidence in limited ways. e.g in the potential HB trial, the uniquely similar nature of the rape of the american woman might be regarded by the judges as also probative. So you have the eye witness identification from the victim, plus similar fact. However without the witness testimony, you cannot use this kind of reasoning absent a unique signature.
Of itself, CBs criminal records does not make it more or less likely he did it. Even if he broke into holidays apartments, and even into OC. We need more, and we don't have knowledge of what the 'more' is. Otherwise you run into the logical fallacy of claiming CB likely is responsible for numerous of these reported offences, despite us having no evidence he is tied to even one of them.
At the end of the day, it should make no difference whether this type of evidence is assessed by judges alone (germany) as opposed to judge and jury (UK)
The Judges will need to see clear evidence linking CB to the actual murder, before they would be willing to entertain similar fact evidence.
Personally I think we cannot evaluate any of this, until HCW shows his hand.
But from my POV, it is increasingly hard to know what else HCWs team is working on all this time. My feeling is they are still looking for a break in the case, and often these come externally, as was the case so far.
An accomplice ratted CB out. yet despite this, 3 years later still no charge. So either the evidence is gone, is hard to find, or does not exist.
If we are still hear having the same discussions in a year, can we really maintain the idea this investigation is till on track?