Read the transcript. He did enough.
http://www.esquire.com/features/predator0907-3
I think the DA suspected a trap and cut it off. By then, it was too late though. He had already arranged the meeting (which the DA dogged). Remember, they are talking via phone as well as chat.
So, where is the testimony where an expert witness states conclusively that the voice on the tape is the voice of Conradt?
And where are the chain-of-custody records that demonstrates that the transcripts are complete?
How about the stenographer's sworn affidavit that the transcript is complete and accurate?
And where is the forensic analysis of the e-mails to demonstrate that the offending chat came from Conradt's computer?
Where is any of this stuff?
Even if we take everything Dateline NBC says at face value (which is a dubious proposition, given their history of lying), all you have is somebody chatting with Conradt's e-mail address and talking from his telephone.
Suppose somebody else was staying at Conradt's house and using his computer and telephone? How would the "evidence" collected by Dateline NBC differentiate between that person and Conradt?
And, of course, you have to deal with the fact that the folks at Dateline NBC are confirmed and repeated liars, who will fudge evidence and disregard anything that gets in the way of a story.
Now, I'm not saying that Conradt is probably innocent. In fact, I would say that he is probably guilty. But our system demands a higher standard than "probably" prior to punishment.