This bill proposes to amend federal law to establish an additional aggravating factor for consideration in death penalty sentencing . The new factor would apply in cases where the defendant is an alien who entered or remains in the United States in violation of federal law . Specifically, the bill amends Section 3592(c) of title 18, United States Code, to include this new criterion. This aggravating factor would be considered if the unlawfully present alien has been convicted of killing, attempting to kill, or conspiring to kill a United States citizen .