Almost all of these cases are being cleared because DNA got shoved into a large enough private database that practically everybody now coughs up a correlation.

Almost all of these cases are being cleared because DNA got shoved into a large enough private database that practically everybody now coughs up a correlation. This has very little to do with diligence and more with technology advancing. And, while clearing murders is nice, wait until the equivalent RealPage gets hold of that database and starts discriminating based on your DNA.