wyvernfriend
Casement gave his health in the service of the crown, he investigated atrocities in both Congo and Brazil. He started asking inconvenient questions about colonialism and when he did this he also had to ask inconvenient questions about Ireland and it's experience and this led to his sympathies with Irish Nationalists.
This doesn't go into much about Casement as a person, though I suspect he was quite driven and probably got very mono-focused when he had something to research. He made friends and then drove them away and was probably quite a complicated man to deal with. Still he has influence and his legacy of talking about fair trade exists to this day.
His trial was a mess, his legal council let him down and the country that held his actions treasonous actually treated him so badly it wasn't funny.
A complex man and this is probably not the last biography to be written about him.