Intro
The first part of this story can be found here: https://ahmadiyyafactcheckblog.com/2018/03/01/how-did-mirza-mahmud-ahmad-marry-noorudins-daughter-in-1914-amtul-hai/

The second part
In the second part of this video, Professor Chaudhary Ghulam Rasool Sahib explains, how the Khalifa murdered his own wife.

The video