Presidents & Prime Ministers around the world are being jailed

Just this week, 5 days ago, ex-PM of Malaysia, Najib was arrested.

UPDATED: ​Malaysia Reacts to the Arrest of Former PM Najib Tun Razak

4 days ago, in Ecuador, an arrest warrant was issued against 10 year President Correa.

Ecuador seeks arrest of former president in kidnapping inquiry

2 days ago, Pakistan ex-PM, Nawaz Sharif has been jailed and vows to return from London.

Former Pakistani PM Nawaz Sharif sentenced to 10 years in prison over corruption linked to purchase of London flats

One President of Brazil is already in jail (Lula) while Rouseff was impeached and may also end up in jail.

Ex President of Korea, Park Guen-Hye, was also jailed for 24 years on corruption charges, in Apr 2018.

Bangladesh PM Zia was also jailed in 2018.

Here is a full list of Prime Ministers or Presidents have been jailed. But 2018 is turning out to be quite unique and many senior politicians have been jailed worldwide, which seems to be more than ever before.

https://en.wikipedia.org/wiki/List_of_heads_of_regimes_who_were_later_imprisoned