DALLAS A third man is now in custody for the murder of a Good Samaritan who tried to break up a fight on Lower Greenville Avenue in Dallas on Saturday morning.

Police say Rodney Williams, 21, admitted cleaning up blood from a car and holding people back from helping Terrell Cowherd, the 26-year-old man who was killed.

Julian Martin is accused of stabbing Cowherd to death. Investigators say a third man, Jerry Brown, held Cowherd down during the fatal assault.

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