Well, corruption corrupts Macbeth - under the influence of his wife and his own growing ambition, he succumbs to the dark side and kills Duncan, so that he can become the next king. He continues murdering people, having lost his conscience, all in order to keep the throne that is rightfully not his to take.
When Rick had a fight with Pete, in that fight he got a scar on his face when both of them during the fight broke through a window.
<u>Explanation:</u>
In season 5 B, a fight has been shown between Pete and Rick. In that fight, both of them broke through the window.
Because of this, Rick got a scar on his face. Later in a scene when Rick is seen talking to Carol, bandages can be seen on that spot which occurred at the time when he had a fight.
To begin with, we don't really need an explanation so i am just gong to say he did not ignore the brief because he obvosiously heard about it. thank you.