MONTREAL — A former Montreal police investigator warns that more violence could follow this week’s shooting at a Starbucks north of the city, as the victim was formally identified as an organized crime figure. Laval’s police chief described him earlier in the week as a person connected to organized crime, and parole board records show a criminal past that includes drug trafficking, weapons possession and conspiracy. Pietro Poletti, a former lieutenant detective with the Montreal police, says street-level organized crime today is marked by easy access to guns and the lack of a single leader imposing rules. Laval police Chief Pierre Brochet said Wednesday after the shooting that police would increase visibility on the territory, as well as pressure on organized crime. He said organized crime in Laval has been marked above all by rapid change.