What arguments did the defense attorneys use to get Bryant and milam acquitted from Emmett till trial?

They did not need an argument as an all-white, all-male jury was selected, & they refused to indict Bryant & Milam on kidnapping charges. Carolyn Bryant (the white woman) also testified. However, it was argued by the sheriff that because his body was so badly tortured & after it has been submerged in water for days, there was no way to even tell Till's body was even him.