Complex sentence: The leader of gangsters, who is in conflict with Daulatram, sees what is happening and takes the opportunity to kill Daulatram an frame Amar to get back at Siddhant.
Split into simpler sentences: The leader of gangsters, who is in conflict with Daulatram, sees what is happening. He takes the opportunity to kill Daulatram and frame Amar to get back at Siddhant.