education (6) Moscow theatre hostage

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John: Miuson is the person in this link. https://kamchihau.blogspot.com/2022/08/httpskamchihau_68.html?m=1 .
Me: Ok.
John: It happen in the year of 2007.
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Kelvin: Look at the photo. He is Heng Jai. He is the colleagues of John's elder brother.  He is a Cocaine addict. He is now in KK disco. 
Mr.Chan (a superintendent of police of Hong Kong): How do you know that he is now at KK-Disco ?
Kelvin: I hack the telecom.  I steal the physical address of the SIM card of Heng Jai from the telecom.  Of course,  I know it.  You disguise yourself by plain cloths and go there immediately. You pretend to be a Disco goers. And then, you ask him whether he wanna buy Cocaine or not . If he buy the Cocaine, You arrest him.
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Bradley: Kill those students, e.g., Mr. Chan.
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Kelvin : Hey ! He's enforcing the law. 
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Bradley : He isn't enforcing the law.
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Kelvin : Yes,. He is.
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Bradley (angry):  Don't argue with me. Kill him still. 
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Kelvin : Please. 
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Miuson : You told Bradley that Mr. Chan is just enforcing the law.  You are not gonna teach him any hacking techniques. 
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Kelvin : That's the only way I save him. 
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Miuson look at the sky and take a deep sigh and say, 
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Kelvin : I kill 140 hostages in Moscow theatre.  Why? I warned Bradley,  "Don't touch Kelvin's students,. Mr. Chan.  They are under my shelter. ".