You know what I first thought? I first heard that Deepak was brought to the hospital for a forced DNA sample, didn't hear that so were the other two. I thought that maybe Deepak's hair or DNA was on the tape with Natalee's and I was wondering if Joran's Dad had "arranged" for such a piece of evidence to exonerate HIS child and send Deepak to prison for life. Remember, he'd do ANYTHING for his son...
And where and how would he get hair from both people to plant it? Not feasible.