I'm going to put the laughter down to shock - but this is a really strange reaction.
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Shock and disbelief!
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Yeah, if he didn't react strangely, it'd be a problem. Not his fault his brother was who he was.
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This dude is weird.
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Nothing weird about him, people react differently to stress. I chuckle nervously when I'm stressed or under pressure.
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My sympathies to this man and his mother. They are victims too. Brave of him to go on tv.
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I smell something fishy
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Me too. Immediately listening to this I see others connected now. Was this man Set up and killed ?
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Ordinary people like us will never know the truth about this. We'll only know what the government and media wants us to believe.
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Cheery fella, for someone who just lost his brother.

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Appears to me to be someone in total shock. In shock no one acts like they would normally.
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Y'all are so desperate for ratings that you need to press an already stressed family?
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This guy wasn’t forced to be interviewed lol wtf
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The poor guy is obviously in shock. How could he not be?
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I don't like interviews of vulnerable people. He's in crisis.
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Me neither.
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How is this guy laughing? Something does not sit right with this
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That is so obviously NOT humor laughter, that is nervous shock laughter, he is clearly in disbelief
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Definitely shock. This guys brother just committed an atrocity and died. He doesn't know what to think
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