I think that around episode hundred and also during the time that razia and gaffur were discussing dilshads murder attempt, you will see ...
A. Razia mentions clearly to gafoor that rashid did not murder anyone, she did.
B. In rashids flashbacks nad razias, they show gaffur taking pictures as rashid burns the gudiya factory.
C. As recently as the eid episode, gaffur remembered the whole thing again.
He has built up SM on a foundation of murder. He knew that there was a woman that razia stabbed, that burned in the fire. Whether he knew that was zainab or not, its hard to say. He was nontheless, an accomplice.
What is still a mystery is where zoya was at that time, who rescued her from the fire and who put her in the orphanage?