Unlawful Suppression of Evidence Coupled With Premeditated Perjury is a Capital Offense

Unlawful suppression of evidence coupled with premeditated perjury is a Capital Offense if it results in death.

So far, 5 have died in captivity.

I See Dead People
https://imgflip.com/i/8pypgw

Unlawful Suppression of Evidence
Unlike lawful suppression of evidence proposed by a defendant, an unlawful suppression of evidence is made by a prosecutor who improperly or intentionally hides or withholds evidence.
https://www.law.cornell.edu/wex/suppression_of_evidence

Perjury Resulting in Death
18 U.S. Code § 3592 - Mitigating and aggravating factors to be considered in determining whether a sentence of death is justified
https://www.law.cornell.edu/uscode/text/18/3592

See also:
US Federal Statute for Perjury
1743. Perjury -- Overview Of 18 U.S.C. §1621 And 1623 Violations