NBC News reports: The double murder achieved its goal. It sent the message that, even here in the relative safety of Turkey, ISIS and its supporters can reach its critics.

The bodies of 22-year-old Ibrahim Abdel Qader and 20-year-old Fares Hammadi were found early Friday in an apartment in the Turkish town of Sanliurfa. Qader had been stabbed dozens of times and both men were, in the gruesome fashion that has become ISIS’s trademark, beheaded.

The deaths of the two young Syrians, both members of a citizen-journalist group called “Raqqa Is Being Slaughtered Silently,” sent shockwaves through the exile Syrian community here.

How did two young men, known targets of ISIS who took measures to protect themselves, end up dead?

NBC News has now learned the answer to that question: In an exclusive interview, Ibrahim’s brother, Ahmed, explained what happened. [Continue reading…]