The most influential pro-Islamic State Twitter account to be followed by foreign jihadis - Shami Witness - is shut down after a Channel 4 News investigation uncovers the identity of the man behind it.
He spent his mornings, afternoons and evenings sending thousands of tweets of propaganda about the Islamic State militant group, acting as the leading conduit of information between jihadis, supporters, and recruits.
His tweets, written under the name Shami Witness, were seen two million times each month, making him perhaps the most influential Islamic State Twitter account, with over 17,700 followers.