Black Jack by Max Brand — Read

Terence Hollis had gone out of the room and up the stairs like a man stunned or walking in his sleep. Not until he stepped into the familiar room did the blood begin to return to his face, and with the warmth there was a growing sensation of uneasiness.

Something was wrong. Something had to be righted. Gradually his mind cleared. The thing that was wrong was that the man who had killed his father was now under the same roof with him, had shaken his hand, had sat in bland complacency and looked in his face and told of the butchery.