[s1e10] Revelations < HOT >

This suggests Audrey was Piper's accomplice or at least helped her coming to Lakewood, casting doubt on her "victim" status and setting up the mystery for Season 2. Guide for Viewers

After a struggle on the dock, Emma shoots Piper in the forehead, ending the immediate threat. The "Revelations" Cliffhanger [S1E10] Revelations

Emma and her mother, Maggie, are lured to the lake docks—the site of the original Brandon James tragedy twenty years prior. The Big Reveal: Who is the Killer? This suggests Audrey was Piper's accomplice or at

Piper reveals she is the biological daughter of Maggie Duval and Brandon James, making her Emma’s half-sister. She was given up for adoption and grew up resentful of Emma’s "perfect" life while she felt abandoned. The Big Reveal: Who is the Killer

Most of the surviving teenagers gather at Brooke Maddox’s house for an after-party. The killer strikes here, attacking Brooke and trapping her in a freezer. Jake eventually confesses he was the one spying on her via webcam, though he was not the killer.