State v. Corey Allen Thiel, 343 P.3d 1110

Corey Thiel violated probation and began serving a 356-day county jail sentence (credit 67 days) in Ada County.
Ada County Sheriff recommended early release under Idaho Code § 20-621, calculating 5 days off per month (~55 days), producing an early-release date.
The magistrate judge refused to sign an order effecting the release and expressly declined to accept the sheriff’s recommendation; the sheriff nonetheless asserted authority to release.
Thiel moved for immediate release; the magistrate denied the motion. The district court (on intermediate appeal) reversed, ordering the magistrate to follow the sheriff’s recommendation.
The State appealed to the Idaho Supreme Court, raising (1) whether § 20-621 gives magistrate courts discretion to reject a sheriff’s recommendation and (2) whether a no-discretion reading violates separation of powers.

Issue	State's Argument	Thiel's Argument	Held
Whether § 20-621 vests the magistrate court with discretion to reject a sheriff’s recommendation for good-time early release	"Recommendation" and "be allowed" are advisory; statute ambiguous or gives judge discretion; judiciary must have oversight and victims’ rights to be heard	Statute unambiguous: use of "shall" makes the sheriff’s recommendation binding; magistrate duty is ministerial	Court held statute unambiguous: no judicial discretion; magistrate’s role is ministerial and must effectuate sheriff’s recommendation
Whether § 20-621 violates separation of powers by divesting judicial sentencing authority	If no judicial role, statute improperly divests sentencing power from judiciary	Good-time commutation is executive power; statute is a valid legislative delegation to executive (sheriff) and does not re-sentence	Court held no separation-of-powers violation: commutation is executive, occurs after judgment, and legislature may authorize such a scheme

State v. Hughes, 102 Idaho 703, 639 P.2d 1 (1981) (statute vests sheriff authority to approve up to five days/month good-time reductions)
State v. McCoy, 94 Idaho 236, 486 P.2d 247 (1971) (legislative mandatory sentencing conflicted with courts’ common-law suspension power)
State v. Branson, 128 Idaho 790, 919 P.2d 319 (1996) (discussing common-law powers of judiciary and limits on legislative abrogation)
Spanton v. Clapp, 78 Idaho 234, 299 P.2d 1103 (1956) (distinguishing judicial sentencing from executive pardons/commutations)
Ausman v. State, 124 Idaho 839, 864 P.2d 1126 (1993) (definition and examples of ministerial duties)
State v. Coassolo, 136 Idaho 138, 30 P.3d 293 (2001) (court discretion to grant probation; law-enforcement recommendations are advisory)