First, this isn't a "regular car accident" this accident is related to a shooting. Second, forensics is far superior to what it was just 5 years ago, not to mention 10-12 years ago.  They get one chance to collect as much evidence as possible at the scene, anything that could be related.  They can sort through it for months/years but only get this one opportunity to get everything they can.

Instead of blaming APD, how about you place the blame rightfully on the individuals shooting people around the time of the accident?