See brigettes post #4773 and 4781.
a snippet from SM:
2. All I know about this Charlie Croes discussion is the past 30 or so pages, so I have to go back and catch up. However, it sounds to me like it was the DEA agent from the HI lobby (who first connected with the chaperone) who then called C Croes for the cell info--*assuming* it's possible that the DEA guy does business on a regular basis with C Croes concerning the rental cell phones and their records.
It is likely that the person who connected Charles Croes to the Twitty's is the DEA agent we know was helping the Chaperone before the Twitty's arrived in Aruba - This makes sense on why his name and who he is was is such a big secret.