According to police, one man was stabbed several times. Smith eventually pulled the suspect, identified as Rodney Dwight Banks, 26, off of the victim, according to a post on Facebook.
The victim was taken to Grady Memorial Hospital with non-life-threatening injuries and released.
Smith wrote on his Facebook page where he posted the video, "I just saved dude life, i have blood all over me, i almost got stabbed in the neck, i missed my stop, came back to save somebody life, oooooomy god im shaking."
Banks was arrested and charged with aggravated assault and possession of a knife.
A MARTA spokesperson said trains had to bypass the station as police conducted their investigation.
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