When you are arrested, you are taken into custody. This means that you are not free to leave the scene. Without being arrested, however, you still could be detained or held for questioning for a short time if a police officer or other person believes you may be involved in a crime. For example, an officer may detain you if you are carrying a large box near a recent burglary site. Storekeepers also can detain you if they suspect you have stolen something.
That is what I meant, take the person to be questioned, assess the situation and then make an informed decision. You are advocating that the police just leave the scene, give the shooter a pat on the back and say :"Well done son, when you feel like it, hop round to the station and come give us a date you would like to state your side of events, and don't worry in the mean time feel free to travel abroad, hang on to your firearm, etc etc."
Also I never said that you need to spend time in the cells.
Being questioned and starting the lawful process, THEN being released. The posters above think that on the scene a call should be made whether or not the person that shot (and killed) someone, did so out of self defense or if the person had criminal intent. Now I do not know about you, but I thought that was why courts were there.
