[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.

[Demidog]

There are several, for instance Art I, section 8, clauses 10, 17 and 18.

You are assuming that all those put to death were put to death for the crimes of Treason, Counterfeitting or Piracy.

That is why I suggested you look at the specifics. There is no constitutional authority for the feds to prosecute crimes other than those three listed unless the crimes occurred on federally controlled land.