The FBI Files - Voice of Terror | FD Crime Show The FBI Files - Dangerous Cause: https://www.youtube.com/watch?v=7Xk42XTkFxo In the late 1970s, the FBI had a working knowledge of anti-Castro terrorists operating in the United States. But then a new group appeared, more violent and aggressive than their predecessors. All agents had to go on was a series of chilling phone calls, a mysterious voice, and the threat of more violence. FBI field offices from New York to Miami coordinated their efforts, determined to catch the vicious killers. ▬▬▬▬▬▬▬▬▬ Subscribe FD Crime for free: https://bit.ly/FDCrime Instagram: https://instagram.com/free.documentary/ Facebook: https://bit.ly/2QfRxbG Twitter: https://bit.ly/2QlwRiI ▬▬▬▬▬▬▬▬▬ #Crime #Documentary #FBI ▬▬▬▬▬▬▬▬▬ FD Crime will take you across borders, hot on the heels of international criminals active in the world of finance, and cybercrime. We look at cold cases, most-talked-about crimes, and shining a light into the shadows of national and international counter-intelligence. Free Documentary stands for high-quality documentaries visually and content-wise and FD Crime is the new kid on our block.