Governments routinely downplay or ignore incidents to make them look better.
It used to be a Progressive talking point that government numbers were unbiased and reliable.
We can see they are full of biases. To be reliable, there must be incentives for honest reporting, punishment for poor reporting, and active cross checking unconnected from the original reporters.
Broward County hid crimes.
The Holder & Obama program was designed to keep young black criminals out of jail.
The Broward county sheriff was involved at every step.