I read some crime thriller one time that I remember nothing else about, except:
The serial rapist was taking his victims' Blackberries that had all of their family/personal contact information on it and tellnig them if they reported him, he'd find her friends/family and kill them.
My phone/PDA has required a password to get in ever since and it made me super paranoid about reciepts and anything other paper trail type things.
I think it might've been one of the Patterson Womens Murder Club or something like that.