Complex sentence: Craig was seriously injured and lost the use of his legs, becoming a wheelchair user The clinic staff soon realised the true manipulative nature of Craig when he began to blackmail and emotionally torture Otis as payback for his injuries.
Split into simpler sentences: Craig was seriously injured and lost the use of his legs. Confined to a wheelchair, the clinic staff soon realised the true manipulative nature of Craig when he began to blackmail and emotionally torture Otis as payback for his injuries.