Carpenter believed he was sharing translated materials with an ISIS affiliate. In reality, he was sharing them with an undercover FBI agent.
As the Syrian military and its allies advance on the ISIS' last stronghold south of Damascus, the jihadis' tactics grow more bloody.
The United Cyber Caliphate called on lone wolf attackers to "kill them wherever you find them".
In the video the man shoots five people accused of spying for the U.K.
The pair are believed to have killed 11 people in the Camp Speicher massacre.
Keyboard warriors—official and otherwise—are trying to degrade and destroy ISIS's online propaganda efforts and expose its schemes.
The report found that over half of the group's propaganda is focused on depicting civilian life.
The nation has enforced a number of anti-terrorism laws since the 'Charlie Hebdo' attacks.