In Missouri, a single past mistake can fundamentally change how a new case is handled in court. Being classified as a “Prior Offender” triggers a significant change in the legal process under RSMo 558.016. Once the state proves you have one previous felony finding of guilt, you will lose an important right: the right to have a jury determine your sentence.

1. Defining the “Prior Offender”

Under Missouri law, a “Prior Offender” is someone who has been previously found guilty of a felony.

• “Findings of guilt” include jury convictions, bench trials (trials by a judge), and guilty pleas—even if the plea resulted in a Suspended Imposition of Sentence (SIS).
• The finding of guilt must occur prior to the date the current offense was committed.

So, for example, if someone who was facing changes for possessing drugs on Jan 1, 2026, and while that case was pending gets arrested and changed again for possessing drugs on March 1, 2026, that first case can’t be counted as a “prior offense”

2. The Major Consequence: Judicial Sentencing

The impact of being a “Prior Offender” is the removal of jury sentencing.

• The Normal Process: In a standard Missouri trial, the jury hears the case and determines guilt or innocence. If they find the defendant guilty, they typically assess and declare the punishment as part of their verdict.
• The Prior Offender Process: Once the prosecutor proves a prior felony to the court, the judge “shall sentence” that person – not the jury. (RSMo 556.016.7)
• The Judicial Role: In these cases, the jury’s role is strictly to decide guilt or innocence. They are not instructed on the range of punishment, nor are they allowed to declare it. If the jury returns a guilty verdict, the judge determines the sentence.

3. The State must proving the prior felony finding of guilt

A “Prior Offender” status is not automatic; the state must present evidence—such as certified court records to the judge to prove the prior finding of guilt.