[brownbat]

I was expecting the same thing, it got me searching to see how much clearance rates have responded to new technologies already.

It's not the relationship I expected, clearance rates are steadily dropping despite these advancements.

The following piece considers a few possible reasons why:

https://digitalcommons.newhaven.edu/cgi/viewcontent.cgi?arti...

Some of this may be a corrective effect, DNA is more likely to exonerate and prevent false arrests than it is to identify criminals. Other situations, well, new technology doesn't guarantee that you have enough detectives to clear crimes, or that those detectives are well trained.

Then there's the whole class of violent crimes that happen on high traffic streets where DNA is not likely to be abundant or well preserved.