Try to explain how the text message could be discussed in the interrogation without implicitly referring to the person that sent the message.
The person who sent the message was Amanda
The Kerchers put themselves in this controversy when they gave negative testimony about Amanda. They don't get a one way ticket. Maybe it would be easier to see them as simply victims if they didn't have several million reasons to want to find Amanda and Raffaele guilty instead of just Rudy.
I see I was wrong about the long standing posters. I withdraw my comment and apologise to the rest of you, unreservedly