There are so many possibilities, it is literally mind boggling.
I think by now, everyone in the whole world knows that sometimes mistakes are made in labs. Some labs are really good and really accurate. Other labs are known for being sloppy. Some labs are even known for being unethical and doing things wrong on purpose.
This happened in Texas:
US uproar at sloppy DNA tests blunders
These problems have continued for many years
Crime Lab Problems Continue In Texas, Elsewhere | Prison Legal News
The problems continue to this year:
Austin PD’s Bad DNA Analysis Nearly Cost This Man His Life
Lab workers who did stuff wrong were fired, but they would have gone on to work at other labs - civilian labs in Texas most likely.
I believe this is why Anne Taylor wants to know what lab was involved and what methodology was used. And I think it is a reasonable question to ask because the defendants life is on the line. I would not want to see this line of questioning go unanswered BEFORE the trial as it could so easily lead to an appeal should he be convicted.
I wish the DNA had been sent for testing to a lab in literally ANY other state BUT Texas.