We found information from the book Perseverance about an Ahmadi Murrabi who seems to have quit Ahmadiyya and became a major critic, his name was Maulawi Shukr-Ilahi.  From what we can gather, he was an Ahmadi missionary in 1947, and left Ahmadiyya during the Khilafat of Mirza Nasir Ahmad.

By 1992, ahmadiyya sources had wiped all records of this murrabi
This publication proves that by 1992, Ahmadiyya leadership was slowly deleting all records of this rogue imam.

Links and Related Essays

Click to access Ahmadiyyat-in-America.pdf

Click to access Perseverance.pdf