Complex sentence: Through his childhood and much of his teens, Sutcliffe showed no signs of abnormality; he later, related to his occupation as a gravedigger, developed a reputation as having an unhealthy, macabre sense of humour.
Split into simpler sentences: Through his childhood and much of his teens, Sutcliffe showed no signs of abnormality. Later, related to his occupation as a gravedigger, he developed a reputation as having an unhealthy, macabre sense of humour.