Dallas police have arrested a third man for the murder of a man outside a Greenville Avenue bar.
Terrell Cowherd was killed over the weekend as he tried to break up a fight.
Police said Jerry Brown held him down while Julian Martin stabbed him.
Witnesses said Rodney Williams stopped others from helping Cowherd.
He also allegedly cleaned up blood evidence after the crime, police said.
Williams turned himself in on Wednesday and is now charged with murder.
KDFW FOX 4
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