---
type: "Bill"
title: "A bill for an act relating to postconviction DNA profiling procedure. (Formerly HSB 142.) Effective 7-1-19."
description: "A bill for an act relating to postconviction DNA profiling procedure. (Formerly HSB 142.) Effective 7-1-19."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2019-2020"
identifier: "HF 734"
citation: "Iowa HF 734 (2019-2020)"
classification: ["bill"]
subjects: ["criminal law", "criminal procedure", "defendants", "dna", "dna profiling", "evidence", "identification", "postconviction procedure"]
status: "enacted"
primary_sponsors: []
version_count: 5
action_count: 14
vote_count: 2
first_action: "2019-03-13"
last_action: "2019-05-16"
source: "openstates"
source_identifier: "ocd-bill/6b1d426e-ddf5-4977-8e67-b0216504530b"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 734&ga=88"
source_hash: "39b43008a121139de89c49f39e3252ad75404b7830bd7a5278d912f2b2eaf5b6"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ia"]
---

# Iowa HF 734 (2019-2020) — A bill for an act relating to postconviction DNA profiling procedure. (Formerly HSB 142.) Effective 7-1-19.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/88/attachments/HF734.html)
2. **Amendment H-1071** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/88/H1071.pdf)
3. **Reprinted** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGR/88/attachments/HF734.html)
4. **Reprinted Marked Up** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGRM/88/attachments/HF734.html)
5. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/88/attachments/HF734.html)

## Votes

- Shall the bill pass? — **98–0** (pass) · lower
- Shall the bill pass? — **50–0** (pass) · upper

## Timeline

The legislative action history — every referral, reading, and vote.

- **2019-03-13** Introduced, placed on calendar. `introduction`
- **2019-03-25** Amendment H-1071 filed. `amendment-introduction`
- **2019-03-26** Amendment H-1071 adopted. `amendment-passage`
- **2019-03-26** Passed House, yeas 98, nays none. `passage`
- **2019-03-26** Immediate message.
- **2019-03-26** Message from House.
- **2019-03-26** Read first time and attached to similar SF 594. `reading-1`
- **2019-04-04** Placed on calendar under unfinished business.
- **2019-04-24** Substituted for SF 594.
- **2019-04-24** Passed Senate, yeas 50, nays 0. `passage`
- **2019-04-24** Immediate message.
- **2019-04-24** Message from Senate.
- **2019-05-02** Reported correctly enrolled, signed by Speaker and President, and sent to Governor.
- **2019-05-16** Signed by Governor. `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/6b1d426e-ddf5-4977-8e67-b0216504530b`. Confidence: reported (aggregated from official Iowa legislature records).