Should an Officer who was non-selected for promotion, and discharged at 16 years of service, reenlist to finish their 20?

Yes. If it was an enlisted man question it would not be asked. It happens and is unfortunate but that just the way the system works.

I recall a US Army officer who was rifted out. Enlisted in the Army and had to go through BASIC with the kids. But he was in better physical shape than any of the kids. Finished two years to get his 20!

Unless rules have changed in the US Army I believe if you come back as an enlisted you can still reire at the highest Rank you held...may take a bit of paperwork but it is work it!!

I was a two time non-select in 1996, told at drill on Saturday, during your equipment in tomorrow & you don't need too come back.
After being out 5 years, I was attending my PLT SGT funeral and was asked to consider re-enlisting. I did. The new program called AKO showed me none of my military or cilivian education was on the Army system.
Showed this error to the CDR and it was forwarded to the AL TAG. His office refused to assist. So a Congressional was filled. To keep it short E4 to O4 in about 12 months. Did I mention this was 2003 & 2004 deployed to KU in OIF.

Yes you should b/c unless the service has changed the rules you will retire at the highest rank held ie, captain.

Have you thought of active reserve service? Though collection of retirement pay is delayed, you are eligible to apply for VA compensation and continue to serve. Depending on your rating could end up collecting more.

Yes, but do you not have another option? Can you take your 16 years and transfer to the Army Reserve or National Guard? As an enlisted member, I used my 11.5 years of active duty to gain many more points towards retirement than most of my fellow Guardsmen. An officer should be able to do the same . . . ??? If you do go enlisted to finish your 20, do you not have the option of collecting retirement at the highest grade?

I would.

Prosecuted yes. Persecuted no. Fair justice. That is what we all fought for, regardless of the #@$$ who committed treason.

Why throw away 16 years of your life if you can go the other route The retirement pay for enlisted will be less than officer, but still a monthly paycheck. Don't know what rank you would get when you go to enlisted.