I do not think anything will be achieved in finding SS until it is treated as a separate incident , which I have no doubt the police would have done , but because everything and more gets lumped together in this forum , it goes nowhere
I am not aware of anything apart from speculation that links BRE to SS ... he may well be responsible for it ... but there is nothing tangible to say he is ... SS, like all other Possible associated crimes should be treated separately until there is evidence to say otherwise , that's the way I look at things
Re SS I think you have to go back to the start and forget all that's happened since ... the talk at the time it became possible there was more than one victim was that it was a taxi driver , a security guard , a police officer ... someone who could take someone of the street without raising suspicion or a noise , I am not implying it was any of these people ,but the search should start from the beginning