The Great Gatsby
Who does George Wilson think killed Myrtle?
Myrtle was killed but who does Wilson think killed her?
Myrtle was killed but who does Wilson think killed her?
George Wilson thinks Gatsby murdered Myrtle. Tom Buchanan would have had something to do with that.
Wilson determined that Gatsby asphyxiated (or X-out) Myrtle.
George decided that Gatsby murdered his wife. So George murdered Gatsby for murdering Myrtle.