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Founder and CEO of Telegram messaging service arrested in France
(www.tf1info.fr)
This is a most excellent place for technology news and articles.
Well, telegram has public and private conversations. So in this example, you'd know because they were having trafficking parties on their front yard and the police of multiple countries notified them to let them know. And then you were aware of this issue so you purposely avoided being in numerous countries that want to arrest you. Seems like he knew.