I am SO Confused

The Fifth Amendment to the Constitution of the United States says:

No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury . . . , nor be deprived of life, liberty, or property, without due process of law . . . .

The Sixth Amendment adds:

In all criminal prosecutions, the accused shall enjoy the right to a speedy and public trial, by an impartial jury of the State and district wherein the crime shall have been committed . . . .

Eric Holder says:

Any decision to use lethal force against a United States citizen — even one intent on murdering Americans and who has become an operational leader of al-Qaeda in a foreign land — is among the gravest that government leaders can face . . . .

Well, sure it is. Because they have to make a presentment or bring their evidence to a Grand Jury, and then arrange for a speedy and public trial by an impartial jury. Right? That must be what he means, right?