RG Kar case: Did samples from Tilottama's kidney-liver really change in 09BC? The letter goes to the CBI.

RG Kar Case - CBI Investigation: The letter states that the sample of Tilottama's viscera which was taken in 09BC has been changed to 09BC. Samples were taken from Tilottama's liver, kidneys, stomach, to see if there was any poisoning in Ti