“Was CB in the area a number used by him was ,so unless the caller or was it recipient qualifies it by saying it was CB they were talking to then he can't be placed there”.
IMO he can be placed there by different forms of evidence. Although early in the season there will have been a mild level of tourist footfall, therefore a lot of holiday photos in circulation. IMO it’s probable that a tourist photo or video exists with CB in the background. The German’s no longer appear (publicly) too focussed on appealing for the caller. Perhaps they’ve confirmed his presence at the scene in other ways. Obviously there are other indications he was very much in the area. Including cell site triangulation, Carole Tramner claiming she spotted CB that afternoon, CB telling people he was near the OC & the material evidence he murdered MM. But IMO, other than forensics or CCTV, pictures or videos of him in the area would be the next strongest piece of evidence.