I was never talking about past cases.
And as far as DNA, there’s lots of crime, particularly nonviolent crime where DNA plays no roll.
Bank scams, confidence scams, robbery, you name it.
There are people who will kill for $80,000. Just because you won’t doesn’t mean others won’t.
It is you who watch too much CSI. People get convicted all the time with just circumstantial evidence. No science magic involved at all. Setting up a crime event so it points to you isn’t difficult with a little planning.
Yeah, there are a lot of people who will kill for $80,000, but I don't think they can pull off a masterful plot to get themselves wrongfully convicted and then have the DNA to clear their case.
Evidence is hard to get rid of, such as footprints, finger prints, saliva, hair etc. Even a thief in the type of crimes you mentioned would leave some type of evidence that would be discovered and examined.
But hey what do I know? I watch too much CSI, though so far I haven't seen any with Larry Fishburne.