Problem is in this country you can't sue a doctor for failing to pick up on your cancer or whatever. If you believe something is wrong then you have the right to get a second opinion. Otherwise we would be sueing for everything. Your banana has a bruise on it, sue the checkout operator who should have spotted it. Cops are human too. Mistakes will be made the question needs to be if it was you or I in his position how would we want to be treated?
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