Felony Defense Investigations in South Dakota

01How a case moves

From Magistrate Court to Circuit Court

Under SDCL 23A-6-1, every public offense must generally be prosecuted by an indictment or by an information signed by a prosecuting attorney, with narrow exceptions for minor offenses and ordinance violations. Felony cases therefore begin with a charging decision and move into circuit court, the general jurisdiction trial court in each of South Dakota's 66 counties. Magistrate judges act as committing magistrates under SDCL 16-12B-10, which covers early proceedings in felony matters. A defense investigator is most useful when brought in during that early window, before positions harden, and our guide to lawful investigation methods describes how we operate.

The seven judicial circuits vary widely in size. The Second Circuit covers only Minnehaha and Lincoln counties but includes Sioux Falls, the state's most populous city, while the Sixth Circuit stretches across fourteen counties in central South Dakota. A felony filed in Hughes County is heard at the courthouse on East Capitol Avenue in Pierre; one filed in Pennington County goes through the clerk on St. Joseph Street in Rapid City. We learn each court's local practice, and our Pierre investigators cover much of the central circuit.

02The stakes

Felony Classes and Presumptive Probation

SDCL 22-6-1 sets maximum penalties by class. As of the 2026 codified laws, a Class 6 felony carries up to two years in a state correctional facility, a $4,000 fine or both; a Class 5 up to five years; a Class 4 up to ten; a Class 3 up to fifteen; a Class 2 up to twenty-five; and a Class 1 up to fifty. Class A, B and C felonies carry life imprisonment. Those ranges explain why counsel invests in a thorough felony defense investigation even when a plea is likely, and our published South Dakota rates keep that investment predictable.

SDCL 22-6-11 generally requires a court to sentence a person convicted of a Class 5 or Class 6 felony to probation, subject to listed exceptions. A judge may depart only after finding aggravating circumstances that pose a significant risk to the public and stating them on the record. That makes the facts around risk central at sentencing. We gather employment records, treatment history, family support and community ties that counsel may use to answer an aggravation argument, and our records and background research team verifies what the State claims about the client's history.

• Class 6: up to two years, a $4,000 fine or both
• Class 5: up to five years
• Class 4: up to ten years
• Class 3: up to fifteen years

03Witnesses

Re-Interviewing the State's Witnesses and Finding Others

Police reports summarize what an officer heard and chose to write down. Witnesses often remember more, remember differently or were never asked the right question. With counsel's approval we re-interview the State's witnesses, take careful notes or recordings where lawful, and identify inconsistencies between what they tell us and what the report says. South Dakota is generally treated as a one-party consent state under SDCL 23A-35A-20, and our recording law guide for South Dakota explains how that affects interviews.

Finding new witnesses takes legwork. We canvass neighborhoods, workplaces and businesses near the scene, review social media for people who posted about the event, and trace anyone who has since moved. In a state where Sioux Falls and Rapid City sit roughly 350 miles apart on Interstate 90, a witness may have relocated across the state or into Minnesota, Iowa, Nebraska or Wyoming. Our skip tracing investigators find them, and our jury pool background checks help counsel prepare when the case is headed for trial.

04Common felony charges

Felony Charges That Turn on Facts Investigators Can Test

Theft cases depend on value. Under SDCL 22-30A-17, grand theft over $1,000 up to $2,500 is generally a Class 6 felony, over $2,500 up to $5,000 a Class 5, over $5,000 up to $100,000 a Class 4 and over $100,000 up to $500,000 a Class 3. Theft of a firearm or livestock valued at $2,500 or less is also a Class 6 felony. Valuation evidence, ownership records and inventory practices can move a case between classes, and our employee theft investigation experience helps us read business records critically.

Other charges we often investigate include identity theft under SDCL 22-40-8, a Class 6 felony; insurance fraud of $1,000 or more under chapter 58-4A, a Class 4 felony; vehicular battery and vehicular homicide, Class 4 and Class 3 felonies under 22-18-36 and 22-16-41; failure to stop after an injury crash under 32-34-5, a Class 6 felony; and a third or later DUI. Each turns on intent, value, identity or timing. For crash cases we coordinate with our hit-and-run investigation unit, and impaired driving priors are covered on the DUI defense page.

05Federal and tribal jurisdiction

Federal Court and Indian Country Cases

The U.S. District Court for the District of South Dakota sits in Sioux Falls at 400 South Phillips Avenue, in Rapid City at 515 Ninth Street, in Pierre at 225 South Pierre Street and in Aberdeen on Fourth Avenue Southeast. According to the U.S. Attorney's Office, between 50 and 60 percent of its criminal caseload involves Indian country offenses. South Dakota is not a Public Law 280 state, so many serious crimes involving tribal members within reservation boundaries are prosecuted federally rather than in state circuit court, with appeals to the Eighth Circuit.

Federal cases bring longer timelines, more agencies and discovery that can arrive in large volumes. We help counsel organize it, identify witnesses the federal agents interviewed or overlooked, and plan travel to reservation communities with respect for tribal government and local custom. Whether a given case belongs in tribal, state or federal court depends on the parties, the offense and the land status, and that is for counsel to decide. Firms handling these matters can learn more on our page for attorneys and through our Rapid City investigators, who cover much of West River.

06Scenes and records

Scenes, Timelines, Digital Records and Seasons

A scene changes. In South Dakota it can change overnight, as a January blizzard buries tire tracks or a spring thaw floods a ditch. We photograph and measure scenes as soon as counsel authorizes it, note lighting, sight lines and distances, and return at the same hour when visibility is disputed. For rural scenes we record GPS coordinates and section-road references so the location can be described precisely in court. Where cameras may have captured movements, we list owners and retention periods for preservation letters, and lawful surveillance work can document recurring conditions.

Timelines combine phone records, receipts, social media, vehicle data and witness accounts. In South Dakota they also have to account for the Central and Mountain time zones, which split the state near the western edge of Jones County on I-90. We convert every record to one zone and note its source. When digital evidence needs forensic analysis, we help counsel identify what to request and from whom. Our investigative consulting service can also review the State's timeline before counsel commits to a theory.

07Mitigation and cost

Mitigation Research, Appeals and What Investigation Costs

Mitigation work gathers the facts about a client's life that a sentencing court may consider: education, employment, military service, health, treatment, family responsibilities and community support. In South Dakota that may mean interviewing employers in a farm town, collecting records from a treatment provider in Sioux Falls or documenting a client's role caring for relatives. We assemble the material in a form counsel can review and present. Cases involving appointed lawyers follow county approval rules, described on our appointed counsel support page.

The state Office of Indigent Legal Services, created in 2024 and led by Chief Defender Chris Miles, handles felony appeals for eligible clients, while trial-level defense remains county based. Investigations sometimes continue after conviction when new information surfaces. Our rate is $100 per hour, with a $1,000 minimum for a single felony and $1,500 for cases with multiple charges, and every felony defense investigation starts with a written scope and price. Counsel weighing the cost can read our guide to choosing a South Dakota investigator first.

Services

Felony defense investigation services in South Dakota

• Witness re-interviewsState's witnesses re-interviewed with counsel's approval, with differences from police reports documented in dated memos suitable for impeachment or motion practice.Learn more
• New witness canvassNeighborhoods, workplaces and nearby businesses canvassed and social media reviewed to find people the original investigation overlooked or never contacted.Learn more
• Scene documentationPhotographs, measurements, sight lines and GPS references recorded promptly, with return visits at the same hour when lighting or visibility is disputed.Learn more
• Timeline reconstructionPhone, receipt, vehicle and social media records combined into one timeline, with every entry converted to a single South Dakota time zone.Learn more
• Valuation and records reviewOwnership, inventory and valuation records examined in theft and fraud cases where the claimed dollar amount decides the felony class charged.Learn more
• Witness tracingWitnesses who have moved within South Dakota or to a neighboring state located through lawful skip tracing and public records research.Learn more
• Crash case supportScene canvass, vehicle documentation and witness work for vehicular battery, vehicular homicide and failure-to-stop felony charges anywhere in South Dakota.Learn more
• Jury researchLawful public-record research on the jury panel for a felony trial, prepared for counsel within the court's rules on juror contact.Learn more
• Sentencing mitigationEmployment, treatment, family and community information gathered and organized so counsel can answer an aggravating-circumstances argument at a sentencing hearing.Learn more

How it works

How a South Dakota felony investigation runs

1. 01

   Scope with counsel

   Defense counsel shares the charging document, discovery received so far and the schedule. We agree on priorities and confirm the scope and price in writing.

2. 02

   Preserve and plan

   We identify perishable evidence, list cameras and record custodians for preservation letters, and plan field travel around court dates, driving distance and South Dakota winter weather.

3. 03

   Investigate

   Investigators document scenes, re-interview and locate witnesses, gather records and build a single-zone timeline, reporting any significant finding to counsel as soon as it arises.

4. 04

   Report and testify

   Counsel receives a written report with exhibits and witness memos for motions, trial or sentencing, and our investigators remain available to testify when they are called.

Compare

South Dakota felony classes, statutory maximum imprisonment (SDCL 22-6-1, summarized)

Statewide coverage

Felony defense support across South Dakota

Second Circuit felonies in Minnehaha and Lincoln counties are supported by our Sioux Falls investigators, and First Circuit cases in the southeast work with our Mitchell team and Yankton coverage. Northeast cases in the Third and Fifth Circuits are handled from Watertown and Aberdeen. West River felonies and federal matters in Rapid City are supported by our Rapid City and Sturgis coverage. Travel to distant counties, including reservation communities, is planned as a separate field operation and quoted in writing before it begins.

• Sioux Falls
• Rapid City
• Pierre
• Mitchell
• Watertown
• Sturgis
• All of South Dakota

FAQ

Frequently asked questions

Every service

Investigations available in South Dakota

Every service below is available in South Dakota and across South Dakota, run by the same Delator Group leadership that manages our Tennessee casework. Choose a service to read how it works in South Dakota.

Service areas

Private investigators across South Dakota