[Demidog]

These prisoners were charged with federal offenses for which the federal death penalty is specified as punishment

Name one. And then name me the part of the consitution which authorizes the feds to prosecute murder laws.

[goldstategop]

Treason, Murder of Federal officials, Sabotage, and Espionage Offenses. The Constitution provides Congress with the power to establish federal courts to punish violations of the Constitution and federal laws.

[spqrzilla9]

These prisoners were charged with federal offenses for which the federal death penalty is specified as punishment "Name one. And then name me the part of the consitution which authorizes the feds to prosecute murder laws." There are several, for instance Art I, section 8, clauses 10, 17 and 18. But your unfamiliarity with the Constitution isn't a surprise.