Both professionally and and program evaluations, and some will in our personal lives, we refer to ethics, come from the work of. [...] Within the UK, it was Kingdom started to emphasize the need obvious to the government that investments for policies and best practices supported were needed, but those investments needed by compelling evidence and empirically- to be effective and effi cient.1 sound research. [...] The key is in knowing when (which received no intervention) to the and where to use what kind of. [...] Research needs to be both by providing quality police services and valid and reliable so you know the results crime reduction is a social value that are legitimate and trustworthy, and not a provides the motivation to do things fl uke or coincidence. [...] However, by drawing on experience alternatives, and weighing the costs and and the available evidence, generating a benefi ts associated with selecting any of.