Desi Collings is a character in Gone Girl. A high school boyfriend of Amy Dunne's, Amy claimed Desi to have gone mental and attempt suicide after their breakup. But when she has no where else to run, Amy is forced to turn to the man who is in love but she once attempted to ruin. Desi is portrayed by Neil Patrick Harris in the film adaption.
He is murdered by Amy when she decides she wants to return home to Nick.