[im a model]

please help me to understand your american justice system. the defense attorney picks the jury?
they give you $15/day to be on the jury and no other perks?
if you dont respond to their letter, they cant do anything anyway?
what happens if one juror finds the defendant not guilty and the other 11 find him guilty? does the guy get off or is it a redo or what?

it is a fascinatingly dumb system as i understand it.