---
kind: "section"
citation: "28 C.F.R. § 28.21"
title: "28"
number: "28.21"
heading: "Purpose."
url: "https://uscodex.org/cfr/28/28.21"
---

# §28.21. Purpose.


Section 3600A of [title 18](/cfr/18.md) of the United States Code (“[section 3600A](/cfr/28/3600A.md)”) requires the Government to preserve biological evidence that was secured in the investigation or prosecution of a Federal offense, if a defendant is under a sentence of imprisonment for such offense, subject to certain limitations and exceptions. The general purpose of this requirement is to preserve biological evidence for possible DNA testing under [18 U.S.C. 3600](/usc/18/3600.md). Subsection (e) of section 3600A requires the Attorney General to promulgate regulations to implement and enforce [section 3600A](/cfr/28/3600A.md), including appropriate disciplinary sanctions to ensure that employees comply with such regulations.


## Notes

### Source

Source: Order No. 2762-2005, 70 FR 21957, Apr. 28, 2005, unless otherwise noted.

### Authority

Authority: 28 U.S.C. 509, 510; 34 U.S.C. 12592, 40702, 40703; 10 U.S.C. 1565; 18 U.S.C. 3600A; Public Law 106-546, 114 Stat. 2726; Public Law 107-56, 115 Stat. 272; Public Law 108-405, 118 Stat. 2260; Public Law 109-162, 119 Stat. 2960; Public Law 109-248, 120 Stat. 587; Public Law 115-50, 131 Stat. 1001.

### Source

Source: Order No. 2699-2003, 68 FR 74858, Dec. 29, 2003, unless otherwise noted.