The man who filmed the murder of Walter Scott by police officer Michael T. Slager says that he is afraid for his life and worries that South Carolina cops will kill him as retribution for exposing the lies and attempted cover up perpetrated by Slager.

The arrest of Slager on a murder charge, and the truth of the incident would never have come to light, had Feidin Santana not used his phone to capture the now viral footage.

The video showed that Scott was running away from officer Slager when the cop pulled out his gun and shot him up to 8 times, killing him. Slager initially claimed that he feared for his life as Scott had attempted to grab his taser and was struggling with the cop. The video also shows Slager throwing down his taser next to Scott's body, in an effort to plant evidence.

Speaking with NBC news, Mr Santana said "I felt that my life, with this information, might be in danger."