Yes but in America we re-open murder cases whenever there is new evidence that is strong enough. In my area, a 20 year old case has new attention because of a apparent confession / bragging about getting away with it that was recorded by police. It's a very fluid story still.
Anyway here's a link:
http://www.syracuse.com/news/index.s..._evidence.html
There are also appeals and whatnot. So really the American system can keep someone basically under scrutiny if not at trial for their entire life. Especially in murder cases which are never closed.