For the first one, in Nevada it's a year in jail
http://www.shouselaw.com/nevada/battery-po.html . It'd be more in other states I think.
For the assault with deadly weapon he's looking at 1-6 years in jail
http://www.shouselaw.com/nevada/assa...ly-weapon.html
So all in all, he's looking to bunk with bubba for 7 years, or maybe half - I'm just a guy on the internet. If he's undocumented then that's the end of him. Either way, you'd be better off not having friends like that because all it takes is to be around them while they do something stupid and you'll be caught in the net too fair or unfair.
With the excessive force, good luck with that. Society tends to side with the cops.
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Late 40's Dreamer (Holy Fucking shit I'm almost 50 and still dealing with this), aged out of original DACA and didn't have a chance to apply for extended DACA after Republicans killed it on the vine.