101 year sentenced to prison for role in Holocaust

A new legal precedent in Germany has made it possible for anyone that played a role in a Nazi camp is now able to be prosecuted for being an accessory to murder. This man claims he worked on a farm nearby but they were able to establish that he worked as a guard at the camp for 3 years. It says that the trial was interrupted several times due to his age (health complications/hospital stays.)

I think anyone who played a role in such an atrocity should be held accountable no matter what age. Is it a fit punishment though? What would be a fit punishment? Due to how long ago this occurred, obviously there aren’t going to be many more cases like this. Thoughts on this?