Kalmadi is likely to sing under interrogation and cross examination. Whatever he had done was done to serve other hidden individuals for whom he played just a stooge. If he blurts out the names of the real beneficiaries of his doings, it might pose grave danger to those elements. He being in judicial custody can not be handled like the few others silenced differently. So the shield of dementia will give that escape route. Even if he were to give out names now, it will be alleged that he suffers from memory loss or cognitive capabilities and hence his testimony can’t be relied upon !!!