I asked this same question yesterday. The only problem is we don't know for sure the times and/or content of those calls...we just know there were calls. One to a fellow MB student's cell phone that was reported difficult to determine if it was her. And one to the Twitty home. It has been rumored that the contect was 'I don't know these people' and 'Are you calling home' with voices in the back ground.
Sooo...
The rumors, which are rumors, said 3 am for those calls. I don't know. Wish Beth could say what she knows soon.