The real - life LAPD has 10,000 officers. LA Sheriff's department has another 10,000. This doesn't even include the cops in the other 76 incorporated cities in LA county which have their own police departments. There's also several federal law enforcement offices in LA (ATF, ICE, DEA, FBI, etc), and a number of military bases in the area.
If you think that the LSPD should "run out" of cops after you kill 300 of them you're a f*cking moron.
Oh, i guess you didn't get what i tried to say. I meant to say that NOT EVERY COP WILL PUT HIMSELF INTO THE FIRE LINE TO RISK THEIR LIFE, JERK. It is normal that cops just go without cover, right where u can shoot them? i guess not. So,killing 300 officers it's a lot