The United States has not permitted torture of suspects as its policy
is a 'rule of law'.

A private individual cannot be an enemy combatant since only Nation
States are recognised to have armies. Anyone else is a common criminal.

Torture historically has a bad record for getting true and useful
information. It has an excellent reputation for getting what you want
to here.

A citizen of a country has a reasonable expectation that his Government
will abide by its own laws in dealing with him and will not hand him
over to a foreign government to enable illegal acts.

If the government is sure of his guilt and the legality of its 'enemy
combatant' legislation they should simply have convened a military
court and had the person convicted and executed. 10 minutes tops for
the 'trial'.