I saw a recreation, supposedly, of the experience of 3 innocent British Muslims picked up by mistake by anti-Taliban Afghanis. These 3 ended up in Gauntanamo and finally got released, but they did not have a pleasant time while in custody.
Long hours in open air “kennels”, and subjection to very loud metal music. Can’t remember any other alleged mistreatment right now.
Treating some detainees with respect does provide benefits.
“We get more out of them,” Leacock added.
Sounds plausible to me.