Priklopil wanted her to love him the most

We know that Priklopil was an extremely paranoid person and it is likely his paranoia would have extended to the rest of society.

It looks as if Priklopil was a social inadequate and a psychopath. He showed typical psychopathic behaviour in his consistent lying and cover stories. Like most social inadequates he probably harboured elaborate fantasies about himself. …

In Priklopil's case he pictured himself as a superman and coerced his victim to behave as if he was, forcing her to address him as "Master" and so completing the fantasy. …

With time, Kampusch seems to have persuaded her captor that their relationship had become legitimate, that they were "in" a relationship. On their few outings together he was obviously passing himself off as a guy with a young girlfriend. When she left, he could not face up to what he was - someone who snatched a child off the street and held her in captivity for years - and so killed himself. Between 20 and 30 per cent of murders are followed by suicide. But in this case Kampusch outwitted her captor; someone with a highly distorted criminal mind who had for eight years been the whole world to her. …

Dr James Thompson [UCL Medicine], 'The Times'