fourm member very good point! but in this instance the robber was in the act of robbery i believe which pushed MR Coley to the absolute extremes of doing what he did,
dagbladet "I've no doubt that the police exercise common sense every day" I'm not sure i fully agree with you there, i was burgled and some ten years ago & although i had solid physical evidence with finger prints on the item of the known burglar i was told over the phone by the police "We will be with you within 20 mins and take the evidence & bash his door down after we've checked it" well 10 years on i am still waiting? i was let down completely i felt no common sense was used in my case...but thats just my personal opinion..
Your case isn't a lack of common sense, it's either not following procedure, or too busy with other work and your case being pushed down the pile until it was lost.
dagbladet is entirely correct, the police show common sense all the time, arresting Mr Coley was the correct and proper procedure, because as fourm member says, it could have been something other than a robbery, and failing to arrest someone who had stabbed a person to death would have been gross negligence.
At the end of the day it is never the police who decide whether someone is to be prosecuted, it's the Crown Prosecution Service.