A Defense Department review of the Fort Hood shooting spree shows that warning signs about Army Major Nidal Hasan were ignored.

The report says doctors repeatedly voiced concern over Hasan's behavior and views on Islam, however the doctors continued to give Hasan positive performance evaluations and that kept him moving up the ranks.

Hasan is charged for 13 counts of pre-meditated murder and 32 counts of attempted murder in the November 5 attack. He remains at a San Antonio military hospital undergoing rehabilitation.

It's not clear whether authorities will seek the death penalty.

Army Lt. Col. Jonathan Withington, a Pentagon spokesman, declined to comment on the West-Clark review because it's not complete. "We will not know the specific content of the report until it is submitted to the secretary of defense," he said.