H4016

Regarding human nature

Introduced·4/10/25
Introduced Text

Allows neuroscience evidence on fight or flight responses in criminal cases in Massachusetts.

This bill amends Massachusetts law to allow neuroscience evidence regarding fight or flight responses in criminal cases. Neuroscience evidence can be presented to show that a defendant's actions were influenced by involuntary physiological reactions, potentially impairing their ability to control their conduct. The bill also mandates jury instructions on the relationship between neuroscience evidence and criminal liability. Records and reports of examinations related to a defendant's neurological functioning, including assessments of fight or flight responses, are admissible.

Included in complete analysis

  • Overview
  • Core Provisions
  • Implementation
  • Impact
  • Legal Framework
  • Critical Issues

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Where it stands

Current
In committee
Next
Committee decision

Sponsors

D
1
0
Democratic CaucusRepublican Caucus

Calendar

Sep 23, 2025

1:00 PM

Joint Committee on The Judiciary Hearing

History

Mar 26

House

Accompanied a study order, see H5281 (under House Rule 27)

Sep 16, 2025

Joint

Hearing scheduled for 09/23/2025 from 01:00 PM-05:00 PM in A-2

Sep 16, 2025

House

Reported by committee to Clerk’s Office for processing, will accompany a study order