The officer down call is broadcast by one officer in unit 9A65. The RTO assigns the call to 9A31 and Van Nuys units. 9 is the division number of Van Nuys. However, when Bosch is talking to his daughter, he says that a Hollywood officer was shot.
Irving asks "Bosch, what do you need to proceed?"
Bosch replies, "Access 302 reports ..."
It should have been "308 reports"
The RTO uses improper terminology. A help call broadcast is "All units, officer needs help [location], officer needs help [location]"