Dana Point California Negligent Discharge - Woman Hit - No Charges

What the hell is wrong with these people - no hard feelings, no criminal charges?
What happened to the onerous assault weapons ban in California, you know the one that infringes on everyone's right to own toys like an AR-15?
What happened to lawful gun owners being responsible? How totally ignorant do you have to be in order to be exchanging parts on a rifle and all the while not know there's a round in the chamber?