[Ortho]

Honestly, I have no idea either. Sometimes, the "defense" thinks up new objections or brings in experts that testify to some really fussy lab procedure and try to pass it off as standard, but there is (as appears to be in this case) usually a standard procedure and it is a mystery to me why labs can ever allow themselves to make basic handling errors and the like. It seems to happen way to often, even with top-notch labs, and I don't know how you can make or oversee a basic error in a case where someone's life or livelihood is at stake and still have a job the next day.