"De Grood, 24, pleaded not guilty yesterday, on the first day of his trial, to five counts of first-degree murder, but he admitted he stabbed the victims — Lawrence Hong, 27, Joshua Hunter, 23, Kaitlin Perras, 23, Zackariah Rathwell, 21, and Jordan Segura, 22 — at a house party in Calgary's Brentwood neighbourhood in April 2014."