That GJ was investigating the Ramseys, not Karr. All public indications are that Karr did not come to the Boulder DA's attention until that Colorado professor contacted them. BTW, that professor certainly also seems obsessed with the Ramsey case and is a weird duck, himself.
I've been thinking the same thing. I wonder if he is trying to sell another documentary to somebody with one more new suspect but the suspect decided to take it a step further for publicity/attention/whatever. The prof seems to be another that has turned a tragedy into some sort of profit center.
I got the same sense about the prof. Here's something to think really hard about...
The CU prof's main area of study, and in fact his obsession (apart from the Ramsey case), has been that the media acts irresponsibly and by that action falsely convicts people in the publics eye.
Next thing you know this prof is tied up with some man who makes a fantastic 'confession' outside U.S. jurisdiction and look at the MSM response? Is this all a setup? If not it's a remarkable irony.