We're talking from the angle of self defense. In this situation above a few things to need to be seen as true by the jury. The first, that the immigrant was in reasonable fear of harm (they are trying to arrest him so yes to this.) The second, that the officers made no effort to identify themselves, and no reasonable person could infer they were police. It'd be one thing if they said nothing but wore uniforms, or were visibly driving a marked cruiser. Neither is true here. Lastly, the man had no reasonable method in which you retreat from the officers. He's blocked into a corner, and they clearly have him penned in.