The judge in his trial has ruled that he was kept in prevention of suicide status far longer than was necessary, but they don't seem to have innovated any special procedures for Manning.

At the same time, it's not everyday that an intelligent soldier with mental issues and possible gender identity confusion on the most far-reaching modern case of deliberate information leakage comes into your brig. Manning's own lawyers admit that he joked about killing himself, and especially at first there was the real danger of being killed by one of the other prisoners. And the fallout of Manning being killed in prison would be extreme, to say the least.

Manning was not treated like a general prisoner, but at least part of that was because he wasn't just a random prisoner accused of a normal crime.