paddock exhibited no sign of mental illness. paddock had no known criminal history. paddock had no known financial problems.
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in other words, no law passed or proposed by those with an anti-gun fetish would have stopped this man, or any other person dedicated to killing as many people as possible, from committing this horrible crime.
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the easy thing to do is to pander to the anti-gun mania that follows these infrequent killings. the difficult thing is to determine how such a person is motivated to kill.