Original sentence: Bruno tells Guy his "amusing" idea about how to commit the perfect murder: two people who hardly know one another at all "exchange" murders; that way, neither one would have a motive, and each could arrange to have a perfect alibi for the time when the murder was committed.Bruno unilaterally goes ahead with his half of the "plan", strangling Guy's wife Miriam on an island in a lake at an amusement park, while she is out on a date with two of her admirers.Guy thinks Bruno is joking and leaves, but Bruno imagines that they have in fact made a bargain with one another
Edited sentence: Bruno proceeds to tell Guy his "amusing" idea about how to commit the perfect murder: two people who hardly know one another at all "exchange" murders; that way, neither one would have a motive, and each could arrange to have a perfect alibi for the time when the murder was committed.Bruno recognizes Guy and knows something of his marital problems from gossip items in the newspapers.Bruno unilaterally goes ahead with his half of the "plan", strangling Miriam on an island in a lake at an amusement park, while she is out on a date with two of her admirers.Guy, at once irritated with Bruno's presumption of intimacy and amused by what he assumes to be a facetious suggestion, humors Bruno that his theory is "okay" and leaves, but Bruno imagines that they have in fact made a bargain with one another