If you only remember one point about getting a prison sentence reduced in South Dakota, remember this: South Dakota post-conviction relief under S.D. Codified Laws §§ 21-27-1 et seq. allows collateral attack on conviction or sentence on defined grounds. There is no freestanding motion to reduce an otherwise lawful sentence. Good-time credits and parole can shorten incarceration for eligible inmates. Procedure, examples, and the opinions below hang off S.D. Codified Laws §§ 21-27-1 to 21-27-18. Good-time credits: Good-time allowances under S.D. Codified Laws § 24-15-18 reduce time served for inmates who maintain good behavior. Parole: The Board of Pardons and Paroles grants release under S.D. Codified Laws §§ 24-15-1 et seq.; eligibility depends on offense and sentence.
Parole, supervised release, and boards
The Board of Pardons and Paroles grants release under S.D. Codified Laws §§ 24-15-1 et seq.; eligibility depends on offense and sentence.
Where discretionary parole was abolished, release is often a function of credits plus mandatory post-release supervision rather than a board “second chance” hearing. Confirm which regime applies to the offense date and statute of conviction.
Walking through South Dakota facts
Use this walkthrough to see which South Dakota authority does the work at each step.
A person sentenced in South Dakota wants the term shortened and must pick the right vehicle.
- File in Post-conviction petitions are filed in circuit court; parole applications go to the Board of Pardons and Paroles; executive clemency through the same board..
- Match the request to a pathway that South Dakota actually recognizes: South Dakota post-conviction relief under S.D. Codified Laws §§ 21-27-1 et seq. allows collateral attack on conviction or sentence on defined grounds. There is no freestanding motion to reduce an otherwise lawful sentence. Good-time credits and parole can shorten incarceration for eligible inmates.
- Account for credits separately from a court reduction: Good-time allowances under S.D. Codified Laws § 24-15-18 reduce time served for inmates who maintain good behavior.
- If the request is release rather than a new judgment, check parole: The Board of Pardons and Paroles grants release under S.D. Codified Laws §§ 24-15-1 et seq.; eligibility depends on offense and sentence.
South Dakota sentence-reduction practice starts at S.D. Codified Laws §§ 21-27-1 to 21-27-18, not at a generic compassionate-release statute.
Where and how to file
Motions and petitions are filed in Post-conviction petitions are filed in circuit court; parole applications go to the Board of Pardons and Paroles; executive clemency through the same board.. Typical sequence:
- Identify the judgment and offense date. Older sentences may still have parole; newer ones may not.
- Check the clock. Many reduction rules expire in 60–180 days (sometimes longer). Missing the window usually forces a collateral petition with a higher bar.
- Gather the record. Commitment papers, sentencing transcript, PSI, prior appeals, and any new medical or legal authorities supporting recall or resentencing.
- Choose the vehicle. Timed reduction motion vs. illegal-sentence correction vs. post-conviction petition vs. board/clemency application.
- Serve the state and calendar any evidentiary hearing.
- Use LawDiver to pull recent South Dakota opinions on the exact statute or rule you are invoking before you brief.
Case law: how South Dakota courts decide sentence-reduction issues
State v. Wilson
State v. Wilson, 2020 S.D. 41 (2020)
…lized an improper procedure for a stipulated post- judgment sentence correction. We affirm and remand with instructions to remove the domestic designation from the aggravated and simple assault convictions and the accompanying obligation to pay two $25 statutory domestic violence fees. Background [¶2.] In March 2014, Wilson was living with his girlfriend, Shannon Ihnen, at a Si…
South Dakota opinions such as State v. Wilson are cited where sentence-reduction is disputed. The court stated: "We affirm and remand with instructions to remove the domestic designation from the aggravated and simple assault convictions and the accompanying obligation to pay two $25 statutory domestic violence fees. Background [¶2." That is the language to brief; the rest of the decision supplies the procedural posture.
State v. Washington
State v. Washington, 2024 S.D. 64 (2024)
…ed assault. He also argues that the circuit court’s written sentence does not conform to its oral sentence. We affirm. Factual and Procedural Background [¶2.] J.B. and Washington were in a romantic relationship in October 2021. At the time, Washington was living in his father’s home with his daughter, father, and stepmother. J.B. was living in a different home with her six chil…
State v. Washington is worth reading on South Dakota sentence-reduction because the court put the point in its own words: "He also argues that the circuit court’s written sentence does not conform to its oral sentence. We affirm. Factual and Procedural Background [¶2.] J.B. and Washington were in a romantic relationship in October 2021." Use that passage as the starting point, then read the facts that precede it.
Richard HAFNER, Petitioner and Appellant, v. Walter LEAPLEY, Warden of the South Dakota State Penitentiary, and Dan
…us other rape charges. On March 16, 1989, Judge Robert Timm sentenced Hafner to thirteen years in the penitentiary. On September 5, 1989, Hafner filed a "Petition for Modification of Sentence" in which he requested a suspension of his sentence "upon conditions that include continued outpatient treatment and such other conditions as are called for in the premises." Judge Timm co…
Practitioners open Richard HAFNER, Petitioner and Appellant, v. Walter LEAPLEY, Warden of the South Dakota State Penitentiary, and Dan when South Dakota sentence-reduction turns on the distinction in this sentence: "On March 16, 1989, Judge Robert Timm sentenced Hafner to thirteen years in the penitentiary." Do not lift it out of the facts the court was deciding.
STATE of South Dakota, Plaintiff and Appellee, v. Kenneth A. WILLIS, Defendant and Appellant
…heard the motion for new trial coupled with a motion for a sentence modification. The trial court denied the motion for a new trial but ordered a sentence reduction from twenty-five to fifteen years. Willis now appeals the denial of his motion for a new trial. We affirm. *153We have already cited the facts of this case in a prior opinion. See Willis, supra. A brief review show…
South Dakota opinions such as STATE of South Dakota, Plaintiff and Appellee, v. Kenneth A. WILLIS, Defendant and Appellant are cited where sentence-reduction is disputed. The court stated: "The trial court denied the motion for a new trial but ordered a sentence reduction from twenty-five to fifteen years. Willis now appeals the denial of his motion for a new trial. We affirm. *153We have already cited the facts of this case in a prior opinion. See Willis, supra." That is the language to brief; the rest of the decision supplies the procedural posture.
STATE of South Dakota, Plaintiff and Appellant, v. Lariy GULLICKSON, Defendant and Appellee
….] At his sentencing, Gullickson received a ten-year prison sentence and was ordered to make restitution. About a year later, Gullickson was granted a sentence modification that reduced his sentence from ten to eight years. The other terms of the original judgment, including restitution, remained unchanged. [¶ 5.] After Gullickson was released from prison on May 18, 2000, he co…
Practitioners open STATE of South Dakota, Plaintiff and Appellant, v. Lariy GULLICKSON, Defendant and Appellee when South Dakota sentence-reduction turns on the distinction in this sentence: "At his sentencing, Gullickson received a ten-year prison sentence and was ordered to make restitution. About a year later, Gullickson was granted a sentence modification that reduced his sentence from ten to eight years." Do not lift it out of the facts the court was deciding.
State v. Edelman
State v. Edelman, 2022 S.D. 7 (2022)
…nge for the State’s recommendation for a one-year suspended sentence to run concurrent with a sentence he was already serving. The circuit court sentenced Edelman to six years in prison with one year suspended to run consecutive to the prior sentence. While in prison, Edelman’s health deteriorated significantly, and he filed a motion to modify his sentence. At the sentence modi…
Practitioners open State v. Edelman when South Dakota sentence-reduction turns on the distinction in this sentence: "State’s recommendation for a one-year suspended sentence to run concurrent with a sentence he was already serving. The circuit court sentenced Edelman to six years in prison with one year suspended to run consecutive to the prior sentence." Do not lift it out of the facts the court was deciding.
State v. Pickner
State v. Pickner, 2026 S.D. 29 (2026)
…ape. The circuit court entered a judgment of conviction and sentenced him to a term in the penitentiary. Pickner was released from the penitentiary on parole supervision in March 2022. In January 2023, Pickner filed a motion for a sentence reduction pursuant to SDCL 23A-31-1, specifically requesting a suspended imposition of sentence. The circuit court granted the motion and pl…
On sentence-reduction, State v. Pickner speaks to the South Dakota dispute in this passage: "The circuit court entered a judgment of conviction and sentenced him to a term in the penitentiary. Pickner was released from the penitentiary on parole supervision in March 2022." The surrounding opinion shows how the court applied that language to the record.
Practical checklist
- Confirm whether the sentence is still inside a Rule-style reduction window.
- Separate illegal-sentence claims from discretionary leniency claims.
- Document program completion, medical hardship, and changed law if seeking recall/resentencing.
- Do not stop serving time or ignore supervision while a motion is pending.
- Search LawDiver for South Dakota opinions citing S.D. Codified Laws §§ 21-27-1 to 21-27-18 before filing.
Key takeaways
- Primary authority: S.D. Codified Laws §§ 21-27-1 to 21-27-18.
- File in Post-conviction petitions are filed in circuit court; parole applications go to the Board of Pardons and Paroles; executive clemency through the same board..
- Good-time / earned credits: Good-time allowances under S.
- Parole / release: The Board of Pardons and Paroles grants release under S.
- Pair this article with the LawDiver search rail (scoped to South Dakota) for sentence modification and post-conviction opinions.
Sentence modification in South Dakota
South Dakota post-conviction relief under S.D. Codified Laws §§ 21-27-1 et seq. allows collateral attack on conviction or sentence on defined grounds. There is no freestanding motion to reduce an otherwise lawful sentence. Good-time credits and parole can shorten incarceration for eligible inmates.
Courts distinguish illegal sentences (wrong length, wrong enhancement, unauthorized term) from legal but harsh sentences. Illegal sentences can often be corrected even late; discretionary reductions usually must be filed inside a short statutory or rules window. After that window closes, collateral remedies (post-conviction, habeas, PCR) require a recognized legal ground — not simply that the defendant wishes the judge had been more lenient.
Good-time, earned credits, and program credits
Good-time allowances under S.D. Codified Laws § 24-15-18 reduce time served for inmates who maintain good behavior.
Credits shorten time served without rewriting the judgment. Lost credits for disciplinary violations can erase months of progress, so institutional conduct matters as much as courtroom advocacy.
Frequently asked questions
Can I get my prison sentence reduced in South Dakota?
Sometimes. South Dakota post-conviction relief under S. The controlling authority is S.D. Codified Laws §§ 21-27-1 to 21-27-18, and filings go to Post-conviction petitions are filed in circuit court; parole applications go to the Board of Pardons and Paroles; executive clemency through the same board..
Does good time automatically cut my sentence in South Dakota?
Good-time allowances under S.D. Codified Laws § 24-15-18 reduce time served for inmates who maintain good behavior. Credits are usually administrative and can be forfeited for misconduct.
Is parole still available in South Dakota?
The Board of Pardons and Paroles grants release under S.D. Codified Laws §§ 24-15-1 et seq.; eligibility depends on offense and sentence.
Do I need a lawyer?
For timed reduction motions and illegal-sentence claims, counsel is strongly preferred. Self-represented filings are accepted in many South Dakota courts, but missing a deadline or choosing the wrong vehicle can permanently close the door.