Fixing your English: he should be thrown in jail.

Since Zhu was never in jail, how could he stay in a place he's never been to?

"You may remember that Zhu had fired over ten millions of workers during his tenure of premier! He was a big criminal, that should be probed for his conducts as premier!"

A better version:

Zhu had laid off tens of millions of workers during his tenure as premier. He should be prosecuted for his crime.