Complex sentence: By the start of 1977, Greg started representing Snapper who had been charged with murder after their father Bill died whose life-support machine had been disconnected by Liz who later had a stroke and lost her memory of what she did.
Split into simpler sentences: By the start of 1977, Greg started representing Snapper who had been charged with murder after their father Bill died. Bill's life-support machine had been disconnected by Liz, who later had a stroke and lost her memory of what she did.