Understand going in to this that I am not looking for anecdotes or personal preferences. I am looking solely for completed studies, preferably conducted within the last 5-ish years or so, that address some or all of the following:
Does this benefit the Detectives? (for example, did applications to the unit increase? Did detectives report higher morale?)
Does this benefit the Department? (for example, did clearance rates increase? Was there any affect on successful outcomes in interview/interrogation settings? )
Does this benefit the Community? (for example, were there signs of changes in community trust? Did witnesses cooperate more readily? Did more people voluntarily seek out detectives to provide information?)
This was requested by a member of my chain of command and I've not found anything recent that is applicable to detectives in the US. I can find plenty for Patrol and a hand full that at least touch on various foreign investigatory units, but nothing that fits my requirements of:
From a law enforcement or academic entity that is "not this one"
Is studying
Note I *do not care in the slightest* if the study shows improved outcomes or worsened outcomes or neutral outcomes. I am not attempting to push policy, solely to provide the information requested so I'm crowdsourcing my job.