Unfortunately, DNA testing nowadays operates on much smaller samples, which are exponentially more difficult to analyze correctly, and there is no oversight. Even worse, simply concluding that the suspect's DNA cannot be ruled out (the result was inconclusive), is often enough for a conviction [1]. This is very cool technology, but the injustice that will result from its use by law enforcement will be terrible indeed…
The main wrongful conviction in article happened in 1999. I'm not sure if they are the same technique used in recent years but the article also alluded to the mother discovering the DNA match was different. For something like that I feel it's not the maturity of the technique but the expertise behind it's usage.