<P> The following morning, Julie finds Max's corpse wearing Barry's stolen jacket in the trunk of her car . When she calls the others, the body is missing . Julie, Helen, and Barry confront Ray about the recent events . Ray claims to have received a threatening letter as well . Julie goes back to visit Missy, while Barry and Helen go to participate in the Fourth of July parade . Missy reveals David allegedly committed suicide out of guilt for the death of his girlfriend Susie in a car accident and shows David's suicide note to Julie . As the writing matches that of the note she received, Julie realizes it was not a suicide note, but a death threat . </P> <P> At the Croaker Beauty Pageant, Helen witnesses Barry being murdered on the balcony . She rushes upstairs with a police officer but finds no sign of the killer or Barry . A police officer escorts Helen home, but the killer lures him into an alley and murders him . Helen flees to her nearby family store, where her sister Elsa is closing for the night . The killer enters the store and murders Elsa . Helen is chased to the third floor of the building and escapes through a window, falling to a long alleyway . She manages to run toward the street, but the killer stops her and slashes her to death, her screams being drowned out by the sound of the oncoming parade . </P> <P> Julie finds an article mentioning Susie's father, Ben Willis, and realizes that Ben was the man they ran over, moments after he had killed David to avenge his daughter . She then goes to the docks to tell Ray, but he refuses to believe her . Julie notices Ray's boat is called Billy Blue and runs away . Ben appears, knocking Ray unconscious, and invites Julie to hide on his boat . On the boat, she finds photos and articles about her friends and her, and pictures of Susie . Ben's boat leaves the docks, and he begins tormenting Julie, chasing her below deck; there, she uncovers the bodies of Helen and Barry in the boat's ice box . Ray regains consciousness and steals a motorboat to rescue Julie . He ultimately uses the rigging to sever Ben's hand and send him overboard . When the police question them, they deny knowing why Ben attempted to kill them, but they are relieved not to have actually killed anybody the previous summer, and reconcile . </P> <P> A year later, Julie is in college in Boston . As she enters the shower, she notices the words "I still know" on the mirror . Moments later, a dark figure crashes through it . </P>

Who is the bad guy in i know what you did last summer