107K views · 1.3K reactions | On Friday the 13th, Christine Markle and her daughters are found murdered. A signed confession points to John Markle, but the blood-stained Halloween mask left at the scene raises haunting questions. Watch “The Friday the 13th Murders” Wednesday on ID. | Investigation Discovery | Facebook
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Documentaries on Demand. Watch 🏆 Emmy® winning originals and documentaries on 🔬 science, 💻 technology, 📖 history and 🌲 nature programs. Plans start at only $2.99/month after your free trial. | Curiosity Stream
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