Board Thread:Manga/@comment-5774380-20160109013258/@comment-26932251-20160112195847

Yeah, but he's a supercharged 15 meter tall juggernaut, as Armin pointed out, there appears to be no way to detain a human that can turn into a titan. You saw how he could break through Wall Maria. I mean, Annie is only in captivity because she went into captivity on her own terms.

No, unless the survey corps can somehow extract Reiner's powers without killing him, there's no way they can detain him.