Telegram founder and CEO Pavel Durov, pictured at a conference in Barcelona, Spain, on February 23, 2016, has been detained by French authorities at Bourget Airport.
Mandatory Credit:	Manuel Blondeau/AOP.Press/Corbis/Getty Images via CNN Newsource

Telegram founder and CEO Pavel Durov, pictured at a conference in Barcelona, Spain, on February 23, 2016, has been detained by French authorities at Bourget Airport.
Mandatory Credit: Manuel Blondeau/AOP.Press/Corbis/Getty Images via CNN Newsource

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Detention of Telegram founder sparks debate about free speech and criminal activity online

The detention of the Russian-born billionaire founder of Telegram, a messaging app known for its unfiltered content, has sparked debate about freedom of speech and illegal content on the internet.