Prior to knowing anything about this specific case, we know that prison guards in part self-select for the desire to abuse prisoners, and are in an excellent position to hide evidence. We also know that prisoners are highly likely to dislike even their honest guards and to be willing to break rules, and thus highly likely to make false claims against their guards. Thus, we can expect even the best judges (faced both with the huge number of falsely positive claims and falsely negative sets of evidence) to do poorly when faced with prisoner-guard lawsuits.