Complex sentence: The children make a pact not to tell anyone what happened and keep the incident a secret, but after they leave, a shadow falls across Robin's body where a rapist is mistakenly blamed for Robin's death instead and is arrested.
Split into simpler sentences: The children make a pact not to tell anyone what happened and keep the incident a secret, but after they leave, a shadow falls across Robin's body. A rapist is mistakenly blamed for Robin's death instead and is arrested.