Just a bit of an observation about the LA city seal. It's a bit more visible on pictures of the patrolman's hat badge:
View attachment 772248
There is a visible shield outline at the top and sides, and dividing lines between the quadrants. The other thing is about the heraldry of the lower quadrants, which can also be seen in this scan of the badge photo from the art book:
View attachment 772249
The lower left element looks to be a modified version of the California flag, except the grizzly bear is rampant sinister (on it's hind legs with it's forepaws outsretched facing the 5-pointed star on it's right) as opposed ot the normal at bay posture, like this:
View attachment 772255
That may be what's on your design but the render isn't that clear. The lower right quadrant doesn't look right though, from the photos it looks like it's based on the Mexican Eagle in the real LA seal, an eagle displayed reguardant (upright with it's wings outstretched an head turned to the right), biting a snake. However, the style of the eagle in the badges looks a bit a bit more like the USA coat of arms eagle, with it's wings raised level with it's head and legs outstretched - this sort of shape:
View attachment 772261
You can also just about see the lines between the quadrants in the scan from the art book too.
All these may acually be there on your model, but not visble in the renders in the OP though.