Okay. Not accusing Lisbon of being Red John, but I found it very odd, that none have noticed the weird detail in the slow-motion scene in the ending of the "the blood on his hands" S03E03. We see our four agents walking towards the camera, in slightly different directions in slow-motion. At last our dear Lisbon - but notice, that after her, another woman with the exact same look (apart from the ponytail) walks the complete opposite way. The suit is the same, the face and bla bla. This can't a camera-mistake cause of the hair differences, and why put a strange random person in such an important and dramatic ending...
Could this be a symbol of a "two-sited" personality, of a secret personality or a way of showing that she is loosing her way? If none of these what then? I don't think this is a coincidence...