Executing someone is a good thing... ?!?

Rating: 4/10 (17 February 2008)

This was a reasonable enjoyable film for me, up until about 1 hour into the movie when I walked away after seeing the following things:
*** spoiler ***
The main character (an inexperienced detective) enters a room with the body of a dead child and a guy who claims responsibility. He says (crying) that something went very wrong.
This makes him the suspect of a horrible crime... but no justice is served because the detective cowardly shoots him through the back of his head!!
Excuse me?!?
A few moments later he is comforted by his wife who tells him that the killer deserved to die anyway.
And... the movie just seems to continue without the detective being arrested and sent to court for the murder he has just committed.
Excuse me?!?
I'm sure that there's a job opening for them in a Guantanamo Bay style prison to bring "justice" to more people.