For a detective or street police, the only real satisfaction is the work itself; when a cop spends more and more time getting aggravated with the details, he's finished. The attitude of co-workers, the indifference of superiors, the poor quality of the equipment - all of it pales if you still love the job; all of it matters if you don't.
Homicide: A Year On The Killing Streets (ed. Canongate Books, 2008) - ISBN: 9781847673909