Slightly off topic as I know you guys are discussing double jeopardy in the US, and as AFAIK new evidence doesn't make a difference here as long as you are accounting for separate sovereigns, but I remember when this made news and the UK had their first "double jeopardy" conviction:
Double jeopardy law ushered out
The ban on "double jeopardy", which has existed for around 800 years, took effect from Monday.
The Court of Appeal can now quash an acquittal and order a retrial when "new and compelling" evidence is produced.