I agree with Jerry that there was some terrible dialogue in this episode.  However, I still enjoyed the episode and how they were deducting who the person could be.  I found it interesting that they didn't include the actual person in their list of suspects at the end, even before they found out the gender of the person.  I also thought it strange that they got information so piecemeal from the police (or whoever).  It was, of course, just a plot device, but not the best one.  Not the best episode.