1. Jennifer said Eliza had broken the window.
2. Mr Gripp said he was sure that John had taken his (Mr Gripp's) snekers by chance.
3. The head teacher said he couldn't believe that it had been Michael who had sent the message about the school fired (если было написано fires; если написано fired, то had fired; если fire - существительное, ничего менять не нужно).
4. A witness said that the police had arrested the wrong person.
5. Donald said that he had been invited to star in a detective movie.