State v. Mburu, 346 P.3d 1086

Mburu was charged with refusing to submit to alcohol/drug testing while having a prior DUI conviction, and he stipulated to prior DUIs pretrial.
Mburu asked the court to accept his stipulation but suppress presentation of the stipulation to the jury; the State wanted the stipulation presented to the jury as proof of an element.
The district court initially allowed evidence of prior DUIs but later excluded evidence of prior DUIs (including the stipulation) from the jury, offering instead a modified elements instruction that omitted the stipulated element.
The State filed an interlocutory appeal arguing the suppression of the stipulation (an admission) was appealable and that excluding it substantially impaired prosecution.
The appellate court considered jurisdiction under K.S.A. 22-3603 and related Kansas precedents, then reviewed whether excluding the stipulation was an abuse of discretion.
The court held it had jurisdiction and reversed: when a defendant stipulates to a predicate-status element, the court must accept and submit that stipulation to the jury (with limits on additional detail).

Issue	Plaintiff's Argument	Defendant's Argument	Held
Jurisdiction to hear State's interlocutory appeal of suppression	State: exclusion of a stipulation/admission to an element is suppression under K.S.A. 22-3603 and is appealable without showing substantial impairment	Mburu: State must show substantial impairment per Newman; otherwise appeal is unauthorized and violates speedy trial rights	Court: Jurisdiction exists. Suppression of an admission/stipulation is appealable under the statute (Mooney distinction); no substantial-impairment showing required for admissions
Admissibility of defendant's stipulation to prior DUI (element of offense)	State: stipulation must be presented to jury; court cannot withhold stipulated element	Mburu: stipulation is prejudicial; court properly excluded it and gave a modified elements instruction	Court: Excluding the stipulation was an abuse of discretion. Under Lee/Mitchell, court must accept and submit the stipulation to the jury, while excluding extraneous details of prior offenses

State v. Newman, 235 Kan. 29 (1984) (interlocutory appeal for suppression of evidence requires showing substantial impairment)
State v. Mitchell, 285 Kan. 1070 (2008) (stipulation to an element presented to jury can preclude suppression of additional conviction details)
State v. Mooney, 10 Kan. App. 2d 477 (1985) (distinguishing suppression of evidence from suppression of admissions; admissions appealable without substantial-impairment showing)
State v. Lee, 266 Kan. 804 (1999) (procedure: defendant may stipulate to predicate status; court must accept and may instruct jury that status is proven by stipulation)
State v. Sales, 290 Kan. 130 (2010) (appellate jurisdiction for State appeals requires adherence to statutory procedures)