. >>> digging deeper into this case we bring in forensic psychiatrist helen morrison. thanks for being here tonight. >> thank you for having me. >> whenever a child this young goes missing this long, bad news seems to be just around the corner. >> you're absolutely right about that. most people understand that the first 48 hours are critical in any investigation, and it's been so long now, and the question is, was she taken? who might have taken her? what would the motive have been, and where is she now? bringing in cadaver dogs is not unusual, that's pretty normal as far as protocol is concerned, but the question is, with all of those leads, why hasn't there been someone named a person of interest? >> you raise an interesting point there, but the fact that there hasn't been a person of interest named against this backdrop of hundreds of leads. >> right. >> does that mean police don't have one or they're just not talking about it? >> they may not be talking about it. i think one of the things that police have learned over the years is that not talking tends to keep the