In Owings Mills, MD a costume-themed high school party that was intended to be fun took a turn for the worst. When 17-year-old Lily Stewart posted publicly about her empty house for the weekend, many of her friends saw fun, while one saw an opportunity for horror. Around 12:39 AM that day, Rowan Hart, an acquaintance of Lily’s killed one of her closest friends, Mariah Madden using a knife from their kitchen. More information to be found soon…