what does " have been a signal they’d organized between them"mean?
I grant you, that doesn’t necessarily rule out her uncle, or Duffield, because calling them on the alternative number might have been a signal they’d organized between them. Alternatively, she was using Rochelle’s number to speak to somebody else; someone she didn’t want the press to know about. I’ve got Rochelle’s mobile number. Find out what network she was with and you’ll be able to check all this. The unit itself is a crystal-covered pink Nokia, but you won’t find that.”