why where the 2 FBI agents choosen? what was they "talent"

Anderson is an FBI agent sent to Jessup County, Mississippi, in order to investigate the murder of three Civil Rights workers. He is a man who gets his man, and is relentless in the pursuit of justice as he uses any means necessary to get it. Ward is an FBI agent and Anderson's partner. He accompanies Anderson to Mississippi where he investigates the murders of the three Civil Rights workers. He is a man of integrity and is willing to find any way of getting the truth in order that true justice would