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"From the aforesaid authorities, it is quite clear that DNA report deserves to be accepted unless it is absolutely dented and for non- acceptance of the same, it is to be established that there had been no quality control or quality assurance. If the sampling is proper and if there is no evidence as to tampering of samples, the DNA test report is to be accepted."

18. From the aforesaid, it is clear that the prosecution has bounden duty to place on record material apart from quality control or quality assurance in the examination of sample. The prosecution has bounden duty to show and clear the fact that samples were properly obtained, they were sealed properly and possibility of tampering of the same is completely ruled out. There cannot be any quarrel with proposition that biological evidence in the nature of blood, semen, saliva, and tissues used for extracting DNA either from the place of occurrence or on objects may be subject to contamination by the environmental conditions, human error, and bacteria or fungus etc..