Open this photo in gallery:A portrait and a note on the memorial for Constable Mohamed Lamine Benredouane who was killed after a man from Lethbridge, Alta., opened fire in the Côtes-des-Neiges neighbourhood on Monday.Andrej Ivanov/The Globe and MailSave for laterThe Montreal neighbourhood of Côtes-des-Neiges is resilient – sometimes “too resilient,” borough Mayor Stéphanie Valenzuela said this week. “We see things happen time and again.” Persevering through hardship is familiar to the immigrant-heavy district northwest of downtown, where incomes are among the city’s lowest, and the crime rate is among the highest. But those challenges couldn’t prepare Côtes-des-Neiges for the horror...