My friend and I were playing online co-op...we were trying to keep the prisoners alive until the end of the level but they kept dying and fought against enemies. We dont want them to fight against them because they are idiots to get killed easily.

I wish there is some way we can put commands to tell the prisoners to stay in the corner where the doctor was.

It put us a lot of frustrating and literally give up but we kept trying over again and again. So any advices to keep them alive?