Prosecuting Attorney Scott Koerner is the chief law enforcement official in Shiawassee County. He was elected in November of 2020 to a 4-year term on the partisan ballot. Each county prosecutor in Michigan is elected on the same ballot as the US Presidential election every four years, and is constitutionally and statutorily assigned more than 250 specific duties under Michigan law. Prosecuting Attorney Koerner's responsibilities include:
- Being the chief law enforcement officer of Shiawassee County.
- Reviewing, authorizing, and prosecuting violations of felony and misdemeanor criminal laws of the State of Michigan and County Ordinances committed within Shiawassee County.
- Reviewing, authorizing, and prosecuting violations of felony and misdemeanor juvenile offenses committed within Shiawassee County or by juvenile residents of Shiawassee County in other counties.
- Representing Shiawassee County in criminal and juvenile delinquency matters before the District and Circuit Courts.
- Representing the Michigan Department of Health and Human Services in cases of child abuse or child neglect before the Circuit Court Family Division.
- Representing Shiawassee County or the Michigan Department of Health and Human Services in certain appeals before the Michigan Court of Appeals or the Michigan Supreme Court.
- Advising other Shiawassee County departments on legal matters and issues.
Prosecuting Attorney Scott Koerner heads an office of five attorneys, a victim's rights coordinator, and three staff.