Private 1st Class Steven Green-- Iraq's William Doyle

PADUCAH, Kentucky (Reuters) - A former U.S. soldier on trial in the gang rape of an Iraqi girl and the murder of her and her family in the war zone in 2006 was caught in a "perfect storm of insanity," his lawyer told a jury on Monday.

But government prosecutors in the same courtroom said former Private 1st Class Steven Green, alleged ringleader of the slayings, was only interested in killing Iraqis "nonstop" and bragged during a barbecue celebration later that what he had done was "awesome."

Doyle was a similar breed of monster spawned during the Vietnam war.