Think about the life long trauma of the daughter. Not only did she witness the multiple shooting that ended her father's life firsthand, she will have to live with the fact that she indirectly caused her father's death even if she can reason that it is no fault of hers.
When responding to a break and enter and you find two people fighting over a knife. How about next time you shoot the one wearing the ski-mask rather than the one in his underwear.