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---
type: "Bill"
title: "Witness testimony in sexual assault cases: inadmissability in a separate prosecution."
description: "Existing law makes it a crime to commit various acts of sexual assault, including sexual battery and rape. Existing law makes it a crime to possess or use various controlled substances or for a person who is under 21 years of age to purchase or consume alcohol, as specified. Existing law provides, with respect to specified proceedings or investigations regarding felony offenses, that if a person refuses to answer a question or produce evidence on the ground that the person may be incriminated and if the person is ordered to comply but would have been privileged to withhold the answer given or the evidence produced except for the order, the person shall not be prosecuted or subjected to any penalty or forfeiture for, or on account of, any fact or act concerning which the person was required to answer or produce evidence, except as specified. Under existing law, a district attorney or other prosecuting agency may request an order granting use immunity or transactional immunity to a witness compelled to give testimony or produce evidence."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20192020"
identifier: "AB 1927"
citation: "California AB 1927 (20192020)"
classification: ["bill"]
subjects: ["Witness testimony in sexual assault cases: inadmissability in a separate prosecution."]
status: "enacted"
primary_sponsors: ["Boerner Horvath"]
version_count: 6
action_count: 19
vote_count: 5
first_action: "2020-01-15"
last_action: "2020-09-29"
source: "openstates"
source_identifier: "ocd-bill/14402b3b-072e-473a-97b4-603648b1c52f"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB1927"
source_hash: "a31076f1d44e5b42c890edfae0b4e043a333a4fba90ca59ef0c51e9a26cf8181"
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-ca"]
---
# California AB 1927 (20192020) — Witness testimony in sexual assault cases: inadmissability in a separate prosecution.
Existing law makes it a crime to commit various acts of sexual assault, including sexual battery and rape. Existing law makes it a crime to possess or use various controlled substances or for a person who is under 21 years of age to purchase or consume alcohol, as specified. Existing law provides, with respect to specified proceedings or investigations regarding felony offenses, that if a person refuses to answer a question or produce evidence on the ground that the person may be incriminated and if the person is ordered to comply but would have been privileged to withhold the answer given or the evidence produced except for the order, the person shall not be prosecuted or subjected to any penalty or forfeiture for, or on account of, any fact or act concerning which the person was required to answer or produce evidence, except as specified. Under existing law, a district attorney or other prosecuting agency may request an order granting use immunity or transactional immunity to a witness compelled to give testimony or produce evidence.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **01/15/20 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB1927&version=20190AB192799INT)
2. **03/02/20 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB1927&version=20190AB192798AMD)
3. **07/02/20 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB1927&version=20190AB192797AMD)
4. **09/29/20 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB1927&version=20190AB192795CHP)
5. **AB1927** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB1927)
6. **09/01/20 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB1927&version=20190AB192796ENR)
## Votes
- Do pass and be ordered to the Consent Calendar — **70** (pass) · upper
- Do pass. — **50** (pass) · lower
- Consent Calendar AB1927 — **390** (pass) · upper
- AB 1927 Boerner Horvath Assembly Third Reading — **770** (pass) · lower
- AB 1927 Boerner Horvath Concurrence in Senate Amendments — **750** (pass) · lower
## Sponsors
- Boerner Horvath — primary (person)
- Bauer-Kahan — principal coauthor (person)
- Caballero — coauthor (person)
- Carrillo — coauthor (person)
- Chau — coauthor (person)
- Chu — coauthor (person)
- Cristina Garcia — coauthor (person)
- Friedman — coauthor (person)
- Lackey — coauthor (person)
- Limón — coauthor (person)
- Luz Rivas — coauthor (person)
- Petrie-Norris — coauthor (person)
- Quirk-Silva — coauthor (person)
- Wicks — coauthor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2020-01-15** Read first time. To print. `reading-1`
- **2020-01-16** From printer. May be heard in committee February 15.
- **2020-01-23** Referred to Com. on PUB. S. `referral-committee`
- **2020-03-02** From committee chair, with author's amendments: Amend, and re-refer to Com. on PUB. S. Read second time and amended. `reading-1, reading-2, amendment-passage, amendment-introduction`
- **2020-03-04** Re-referred to Com. on PUB. S. `referral-committee`
- **2020-03-10** From committee: Do pass. (Ayes 5. Noes 0.) (March 10). `committee-passage-favorable, committee-passage`
- **2020-03-11** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2020-06-10** Read third time. Passed. Ordered to the Senate. (Ayes 77. Noes 0. Page 4748.) `passage, reading-3, reading-1`
- **2020-06-11** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2020-07-01** Referred to Com. on PUB. S. `referral-committee`
- **2020-07-02** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on PUB. S. `reading-1, reading-2, amendment-passage, referral-committee, amendment-introduction`
- **2020-08-01** From committee: Do pass. To Consent Calendar. (Ayes 7. Noes 0.) (July 31). `committee-passage-favorable, committee-passage`
- **2020-08-03** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2020-08-28** Read third time. Passed. Ordered to the Assembly. (Ayes 39. Noes 0. Page 4373.). `passage, reading-3, reading-1`
- **2020-08-28** In Assembly. Concurrence in Senate amendments pending.
- **2020-08-30** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 75. Noes 0. Page 5322.). `amendment-passage, committee-passage-favorable`
- **2020-09-08** Enrolled and presented to the Governor at 4:30 p.m.
- **2020-09-29** Approved by the Governor. `executive-signature`
- **2020-09-29** Chaptered by Secretary of State - Chapter 241, Statutes of 2020.
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/14402b3b-072e-473a-97b4-603648b1c52f`. Confidence: reported (aggregated from official California legislature records).