You bring up an interesting point. We follow the news for our figures as they are reported. For instance, let's use your example:
According to Deputy Commissioner of Police Gilbert Reyes, there were 545 homicides reported in 2008
and out of that figure, 365 were gang-related. Two things immediately stand out. Ref. Source 6
Notice he said that was the figure of reported
cases. That brings up the question… If someone was found to be murdered in a former year are they added to that year or current and how would they know that - forensics?
Although we take our info from a combination of the police and the media it is sometimes difficult to know the true figure as there are so many varying reports.NOTE:
See where this mix in numbers still happens in 2016 through this Post