This PDF document [1] put together by Ken Butigan compiles evidence of U.S. use of death squads in Iraq.
And this PDF [2] contains similar evidence compiled by the BRussels Tribunal.

This PDF document [1] put together by Ken Butigan compiles evidence of U.S. use of death squads in Iraq.
And this PDF [2] contains similar evidence compiled by the BRussels Tribunal.
Links:
[1] http://warisacrime.org/downloads/deathsquads.pdf
[2] http://warisacrime.org/downloads/dossier.pdf
[3] http://warisacrime.org/taxonomy/term/4