Zack, a local police officer, returned home from work early one day because he was feeling ill. When he entered the home, he discovered his wife, a stay-home mother, in the kitchen with a man, Dallas, whom he recognized to be a police officer colleague. Amber was naked and Dallas was shirtless. After a moment of shock, Zack became enraged, pulled out his duty weapon, and shot Amber. Dallas ran out the back door of the home. Zack gave chase but ended his pursuit in the backyard, returned to the home, called 911, and attempted to save Amber, who had a pulse. She died before the paramedics arrived. Has Zack committed murder for the death of Amber? Manslaughter? Some other crime?