Deutsche Welle has a bit more detail and also discusses the CEO:
https://www.dw.com/en/4-ex-vw-managers-guilty-of-fraud-over-...
Apparently he has some health issues which caused the case against him to be suspended. That might resume later but unclear right now. He's 78 at this point.
The VX emission cheating scandal came to light a decade ago in 2015. If a 78 year old is too old to prosecute, Germany should have prosecuted him a decade ago when he was 68.
Instead, Germany refused to extradite him to the US to stand trial in 2017 [1].
[1] https://www.justice.gov/archives/opa/pr/former-ceo-volkswage...
Many countries do not legally permit the extradition of their own citizens. In Germany, extradition is generally only allowed to other EU countries, which meant the German government’s options were quite limited.