Answer:
The word "best" is functioning as an Object Complement.
Explanation:
Object Complement: is a noun, a noun phrase, a pronoun, or an adjective that follows a direct object restating it; "that movie" = "the best"
The headline should be something about how horrific it is.
A play that ends with death is traditionally considered a tragedy.
A tragedy is a type of a play which ends on a sad note - usually, one (or sometimes many, even all characters) die, and usually in a very tragic way. Take Hamlet for example - almost everyone dies there: Hamlet, Gertrude, Claudius, Ophelia - almost every important characters is gone by the end of the play.
