Costner makes it easy for us to put aside any sense of morality and skim over killings as he spends much of his time fumbling at getting to know his daughter and pumping information from a comedic bad guy who he keeps locked in a car trunk. This baddie supplies details pointing Costner to his targets along with cooking tips and advice on how to relate to a teenage daughter. This character is as necessary and delightful as Joe Pesci in Lethal Weapon: he is not Pesci's take on a Tasmanian devil but a mild, wry, and in the end not really bad.
The rest is spoilers; and that rest for me means silence.