One of the questions that poses itself for anybody who has studied the McCann case, or indeed for the casual observer, is this; could one or both of the McCanns have a severe mental disorder?
A sociopath possesses the ability to withdraw emotion and conscience from situations that may present themselves to them, especially when those characteristic traits hinder their ability to cope with a problem.
A sociopath, whilst convinced they are doing the right thing by a loved one, will ultimately destroy them. They truly believe that they are making those closest to them, into better people, for that person's own good. They will attempt to mould them into what they believe they should be, but in doing so, they will leave the other person lifeless, scared and desolate. Kate's face bears the scars of such behaviour, it is barren , often lifeless, her eyes glazed, and devoid of any happiness. Her actions are no longer her own, as she now finds herself in a mortal state of purgatory, ruled by her "loving" husband, whilst tortured with the need to rid herself of guilt. Something she will never be able to do.
In contrast, Gerry doesn't seem to have aged at all, he has fed his needs from what he perceives as a game, a game that to he is convinced he is winning, but at what cost? How many have suffered at the hands of Gerry McCann, how many more will suffer? One thing is for sure, one day, one way or another, the games are always over, and when that day comes, Gerry McCann, the man who thought he could control the world, will lose everything.