Forensic Statistical Tool Source Code

ProPublica obtained the source code for New York City's Forensic Statistical Tool (FST), developed by employees of the city's medical examiner's office to help analyze complex DNA evidence from crime scenes.

The software source code contained within this repository is Copyright © City of New York and was unsealed by a federal judge after a motion by ProPublica.

For more info, and for links to newly unredacted expert affidavits analyzing this program, please read our story about this source code release.

Read about this program's design and functionality in the medical examiner's office's FST executive summary, user manual, and validation summary.

For more background on FST, read our earlier coverage:

• Thousands of Criminal Cases in New York Relied on Disputed DNA Testing Techniques, September 4, 2017.
• ProPublica Seeks Source Code for New York City’s Disputed DNA Software, September 25, 2017.