Nick Burkett’s family huddled together in the cold, passing a bouquet, candles and laminated sheet of photos between them as they created a makeshift memorial on Denver’s 16th Street Mall on Friday afternoon.

The family of 34-year-old Nick Burkett started a memorial of candles, flowers and pictures near 16th Street and Wazee Street in downtown Denver on Friday, just days after his death. He and 71-year-old Celinda Levno were killed in two of the four random stabbings along the 16th Street Mall last weekend.

City leaders say investments will bring people downtown, but a fatal stabbing spree adds to the challenges that remain.