The reason why your friend keep quite is that he is afraid.Ciber crimes make people disappointed,helpless and scared of everything and every person.They feel that everyone is looking at him in a different eye and he feel very lonely.There are many ways you can do  to make your friend come to real and usual life.You can take him to some counsiling centres to provide him with ideas how to move forward and you can talk to that person continously so that he may be able to forget it slowly and clearly from his mind.
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