<p>In a chilling look at how screens become crime scenes, we uncover a murder that was plotted in Romania and live streamed to 764 members worldwide.</p><p>The investigation explores the power of online manipulation and the worrying reach of 764.</p><p>Written and Produced by Jo Palmer.</p><p>For information and support on issues discussed in this series, visit bbc.co.uk/actionline.</p>
