I tried that link you had for From uk.businessinsider.com: I cannot get it to work. That is the only place I have seen them say that. Would like to see the article. Thanks
I had trouble with that link as well, from shortly after I copied the material.
But the facts as stated are at several other places as well.
All of the ones that I read stated that she intervened in the altercation between two men.
The “homemade and large” is not repeated, but “looked homemade” is common.
Here is a link with the Guardian saying it was two argueing men:
Other witnesses said the attack was launched after the MP became involved in an altercation involving two men near where she held her weekly surgery. A Labour source confirmed Cox was shot and stabbed after she had concluded the drop-in session for constituents at about 1pm.
https://www.theguardian.com/uk-news/2016/jun/16/labour-mp-jo-cox-shot-in-west-yorkshire