I am a homicide detective in Ottawa Canada, we currently have a tenure system in place which puts an expiry date on officers in specialty positions, regardless of how competent they are at doing the job. This system has been in place for 5 years now and the purpose was to try to get experienced officers back into the patrol section. What it has created is the lower moral I have seen in any workplace. People are always worried about where they are going next instead of focussing g on their current duty. We are also loosing expertise in certain fields such as forensics, homicide investigations, drug experts, and human source experts. I believe that if an officer is doing the job and doing it well, leave them there unless they ask for change or their job performance is lacking. What this has generated is protections for lazy workers and the supervisors who don't have to supervise anymore.