The Accused man is a politician, which is a job for trained and experienced people who spin the truth to suit their cause.
The evidence that he had a hand in the death of his tragic wife seems to prove this in my eyes.
He was jealous, proud of his standing in the eyes of the public, and I believe his ultimate frustration with her decision to have chosen another man drove him to act in a state of rage.
Probably a case of manslaughter.