Three links to start off with: one from the CBC and two from the Star. Excerpts follow.
New homicide chief on fighting 'code of silence'
Staff Insp. Greg McLane told CBC Radio’s Metro Morning that a lack of information can frustrate investigators, especially when it is known that witnesses were present when a crime took place.
Just like the witnesses who were there when Dorian Barton's arm was broken, or when Sean Salvati was beaten and then paraded around naked, or when Adam Nobody was beaten and kicked in the face. Have we mentioned that most of those witnesses were cops? And that it took the Star to out Glenn Weddell?