But you do see it happen. If it was public, Chauvin may not be an officer and certainly wouldnt be a training officer.
Shortages are fixed by higher pay.
What are your thoughts on the tour idea?
Shortages are not fixed by higher pay unless you pay your "qualified" and "higher standard" candidates way more than what they could get working in a safer and saner environment.
Everyone suggest higher pay without throwing out a number. How about someone start? How much would it take for you to become a law enforcement officer these days?
The "tours" idea has some merit. Some departments have programs similar to your idea of "tours." Some have mandatory shift rotation, some have specialty assignments but the officer has to qualify and put in for them.
There are downsides to taking someone off the street for a lengthy period of time, such as being rusty with the street sense that makes the hair standup on the back of the neck but you don't know exactly why, AKA instincts. But it is an idea and it should be tried and studied in a pilot project somewhere to find out if it will work. But then you need the manpower to replace the shift cop who is in the three month off period. Not many departments have enough personnel to do that. But it's a good idea, I'm sure some very smart people with good intentions will come up with others. Most cops, like people in general don't like change. But most cops, like most people want to do better than what they are doing today. Maybe because of these terrible and unfortunate events, something good may eventually come from them.
My suggestion is that maybe officers should undergo a regular psych check (annually or as needed) to see if some things have changed due to their exposure to what cops see and do on a regular basis. If they are found to be unable/no longer prepared to fill the position due to mental "injury", it should be treated the same as a physical injury is treated, get them well and if they can't get to the place they need to be to do the job, retirement with the same benefits as if they suffered a career ending, debilitating injury. Nowadays cops, fire, EMS, do tend to get counseling after a particularly nasty incident, that didn't used to be the case. Back in the day, they were told to "suck it up and get back to work", as if nothing had happened. That is a change and for the better.
We need the law enforcement professionals and they need the support of the people they serve. Until that reality sinks in on both sides, it's going to be a big mess.