Free will and the paedophile who may not be responsible for his crimes

If a man molests a child because of a tumour in his brain, can we say that he freely chose to do so? Is he responsible for his actions?

This is a true case from the American state of Virginia back in 2000, in which a tumour in a man’s orbitofrontal cortex — an area that regulates social behaviour — created strong paedophilic urges, causing him…