On April 15, five people were stabbed to death at a house party in Calgary, the city's worst mass murder. Matthew de Grood has been charged with the first-degree murder of Lawrence Hong, Joshua Hunter, Kaitlin Perras, Zackariah Rathwell and Jordan Segura.

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De Grood and the five victims were at a low key gathering to celebrate the end of classes. Here's what we know so far about the events that led up to the deaths until charges were laid.