Michigan 2025-2026 Regular Session

Michigan House Bill HB4508

Introduced
5/21/25  
Refer
5/21/25  

Caption

Crimes: penalties; mandatory life imprisonment for certain crimes in the penal code; modify for certain offenders. Amends secs. 16, 18, 200i, 204, 207, 209, 210, 211a, 316, 436, 520b & 543f of 1931 PA 328 (MCL 750.16 et seq.). TIE BAR WITH: HB 4506'25

Summary

HB4508 amends multiple sections of Michigan’s Penal Code to revise sentencing provisions for a set of serious offenses involving drugs, explosives, poison, terrorism, sexual assault, and first-degree murder. The bill generally preserves the existing criminal prohibitions but updates the penalty structure in several places, including escalating punishments when conduct causes injury, serious impairment, death, or is committed with intent to kill or seriously harm multiple people. It also retains or clarifies provisions for consecutive sentencing, lifetime electronic monitoring for certain first-degree criminal sexual conduct convictions, and mandatory life without parole for specified first-degree murder and terrorism cases. The bill’s changes are concentrated in sections governing adulterated drugs, harmful biological/chemical/radioactive/electromagnetic devices, explosive substances, incendiary devices such as Molotov cocktails, poisoning of food or water, first-degree criminal sexual conduct, and terrorism. In practical terms, it would alter how Michigan courts sentence offenders in these categories, especially by tightening or standardizing penalties tied to resulting harm and by preserving life-without-parole outcomes in the most severe cases. The bill is tie-barred to HB 4506, meaning it would not take effect unless that companion bill is also enacted. Overall sentiment appears supportive in committee, as reflected by the 7-4 vote to report the bill with recommendation without amendment. That vote suggests a majority of committee members favored advancing the measure, though not unanimously. Because there were no committee transcripts provided, there is limited direct evidence of the arguments made in discussion, but the voting pattern indicates the bill was not broadly controversial within the committee majority. The main points of contention likely center on sentencing policy: whether the bill appropriately modifies mandatory life and other severe penalties, and whether the revised punishment structure is too harsh or not harsh enough for the covered offenses. Given the bill’s focus on violent and high-risk crimes, supporters likely view it as a public-safety and deterrence measure, while opponents may be concerned about mandatory sentencing, proportionality, and the breadth of offenses affected. The tie-bar to HB 4506 also means the bill’s fate is linked to related legislation, which may be another procedural point of concern.

Impact

HB4508 would amend multiple sections of the Michigan Penal Code, changing penalty provisions for a range of offenses without broadly redefining the underlying crimes. It would affect statutes on drug adulteration, explosive and incendiary devices, poisoning, terrorism, first-degree murder, and first-degree criminal sexual conduct, primarily by adjusting sentencing ranges, clarifying aggravating factors, and preserving life-without-parole penalties in the most serious cases. Courts, prosecutors, and defendants charged under these sections would be directly affected, and the bill would operate only if its tie-barred companion bill HB 4506 is enacted.

Sentiment

The committee vote suggests generally favorable sentiment toward the bill, with 7 members voting in favor and 4 against reporting it without amendment. That indicates a majority believed the bill should advance, but there was meaningful opposition. With no transcript available, the public record here shows support strong enough to move the bill forward, but not consensus.

Contention

The likely contention is over sentencing severity and mandatory penalties. Supporters appear to favor stronger or clarified punishments for offenses involving poison, explosives, terrorism, and sexual violence, especially where death or serious injury results. Opponents likely object to the breadth of the bill’s penalty changes, the continued use of life without parole in some circumstances, and whether the bill’s sentencing scheme is proportionate. The tie-bar to HB 4506 may also be a point of concern because HB4508 cannot take effect independently.

Companion Bills

MI HB4506

Same As Criminal procedure: sentencing; guidelines for sentencing individuals aged 18 to 21 to life without parole; provide for. Amends 1927 PA 175 (MCL 760.1 - 777.69) by adding sec. 25b to ch. IX.

Previously Filed As

MI HB4507

Crimes: penalties; mandatory life imprisonment for certain crimes in the public health code; modify for certain offenders. Amends sec. 17764 of 1978 PA 368 (MCL 333.17764). TIE BAR WITH: HB 4506'25

MI HB5831

Crimes: terrorism; penalties for acts of terrorism; modify. Amends sec. 543f of 1931 PA 328 (MCL 750.543f). TIE BAR WITH: HB 5830'26

MI HB5911

Criminal procedure: sentencing; mandatory sentencing for certain crimes in the identity theft act; require. Amends sec. 9 of 2004 PA 452 (MCL 445.69).

MI HB5105

Crimes: penalties; penalties regarding certain crimes involving marihuana; modify. Amends sec. 7401 of 1978 PA 368 (MCL 333.7401). TIE BAR WITH: HB 5107'25

MI HB4690

Criminal procedure: sentencing; mandatory sentencing for certain crimes; require. Amends sec. 479a of 1931 PA 328 (MCL 750.479a). TIE BAR WITH: HB 4691'25

MI SB0360

Consumer protection: identity theft; identity theft protection act; modify. Amends ses. 3, 12 & 12b of 2004 PA 452 (MCL 445.63 et seq.); adds secs. 11a, 11b, 20, 20a, 20b & 20c & repeals secs. 15 & 17 of 2004 PA 452 (MCL 445.75 & 445.77).

MI HB5917

Criminal procedure: sentencing; mandatory sentencing for certain crimes; require. Amends (See bill) & repeals sec. 145g of 1931 PA 328 (MCL 750.145g).

MI HB5830

Crimes: terrorism; making terrorist threat or false report of terrorism; modify. Amends sec. 543m of 1931 PA 328 (MCL 750.543m). TIE BAR WITH: HB 5831'26

MI HB5527

Crimes: assaultive; elements of certain offenses; modify. Amends secs. 81d &167 of 1931 PA 328 (MCL 750.81d & 750.167).

MI SB0524

Crimes: prostitution; penalties for leasing houses for purposes of prostitution; modify. Amends secs. 448, 449, 450, 451, 454 & 462 of 1931 PA 328 (MCL 750.448 et seq.).

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