Missouri follows the 85 percent rule for most offenses, which means the expectation going in is serving at least 85 percent of the sentence before release eligibility. On a 5-year sentence that works out to roughly 51 months, or about 4 years and 3 months.
The concurrent designation on his record is actually good news. CC or concurrent means the sentences for multiple charges are running simultaneously rather than consecutively. If he had multiple charges stacked on top of each other running consecutively, the total time would be the sum of all of them. Concurrent means he is serving them all at once, and the longest sentence is what controls the timeline. That is the better of the two arrangements, and it does not add to the 5-year calculation.
On his history, going in at 18 and now coming back at 50 with only one prior is a very different profile than someone who has cycled through repeatedly. A 32-year gap between incarcerations is not a pattern of recidivism. It is a life that went sideways once a very long time ago and is now dealing with a new situation. A good defense attorney can frame that history constructively at any pending court appearances.
The pending court date is worth watching carefully. Depending on what is still being adjudicated, there could be additional charges or outcomes that affect the overall sentence calculation. Make sure he has qualified representation for whatever is still moving through the courts.
In the meantime, 85 percent of 5 years is the working baseline. Clean conduct and completed programming protect that number and put him in the best position for release at or near that mark.