Hopefully they have to have demonstrated some level of quality to be used as legal evidence in convicting someone. Although, I would hope "code analysis" is an infinitesimal part of the validation with the majority being real world end to end tests. (e.g. we can take 10,000 samples, divide them in two, mix them, then use our tool to pair up the samples with 100% accuracy).
So the prosecution can present its case and say they gave the defendant the code for 9 months and here are five other independent reviews. The defense can argue they needed more time. The jury then decides if there is reasonable doubt.
There are papers that do validation of TrueAllelle. I don't know the product well enough to know if it is the same one used in the article, but there isn't info in the article to know if independent validation was done or not.