On the surface, Friday's horrific beheading at an Oklahoma food processing plant appeared to center around a simple workplace dispute.
However, upon further investigation of the suspect – 30-year-old Alton Alexander Nolen – red flags have arisen.
Was the murder an isolated incident? Or terrorism on American soil.
Watch the above video as CNN's Martin Savidge examines a story that has brought up questions regarding the potential of a "lone wolf" inspired by Islamic extremism.
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