The basic problem that the Village Voice articles discussed (I have read the whole series) is that with the use of very detailed crime stats and the fear of crime rates going up which could lead to senior and managerial NYPD
members losing promotions, getting shipped off to a worse precinct and pissing off their top leaders and politicians. To make the numbers look better, there were active behaviors to downgrade crimes from felonies to lessor ones, targeting cops to go to known hot spots for crime, arresting sometimes people that were innocent and so on.. In some cases, these downgrades led to for example a serial rapist to keep going for many months.
Some cops were so unhappy that they had to pull back from really being police to go after criminals they recorded shift roll calls, other conversations with superiors, complained to senior police officials. In some cases, these whistle blowers have faced criminal charges, being forced into a psychiatric hospital, and losing retirement benefits.
Hopefully this will come out and heads will roll, bad officers jailed and the whistle blowers given substantial payments for their brave work.