Forensic scientists working on a paternity suit were surprised to find the father's DNA came from 2 people.
Researchers from all over the world carry out paternity tests regularly. Samples are usually collected from mouth and saliva cells to carry out the DNA analysis.
The team of Dr Lorente encountered a strange case: the saliva analysis (epithelial cells from the interior of mouth) collected from a person undergoing a paternity test gave an incongruous result, DNA which could not come from the man who had carried out the test.
After repeating the analysis, there was an only one possible conclusion: In the mouth of that man there was DNA from two different people.
In an attempt to evade responsibility in a case of extramarital paternity the subject admitted that he mixed his saliva with someone else's in an attempt to mislead the experts and the judge.
After repeating the test it was revealed (with a probability of more than 99.999998%) that he was the biological father.
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