Not quite. At that point a panel will review if he's a danger to society. If they decide he is he stays in prison for five years, then comes before them again. There is no limit on the number of five year extensions, so he will remain in prison for the rest of his life if the board thinks he remains a risk to society.

https://www.npr.org/sections/thetwo-way/2012/08/24/159978667...