JOINT BASE LEWIS-MCCHORD, Wash. (AP) - Defense lawyers are trying to introduce evidence that an Army sergeant charged with the premeditated killing of five fellow service members in Iraq may have had brain abnormalities.
A military judge heard testimony Monday from an expert who says Sgt. John Russell had "significant abnormalities" in his brain structure and function. Dr. Ruben Gur says the abnormalities indicate Russell could have had difficulty regulating emotions.
But experts called by the government suggested Russell's brain is normal.
Col. David Conn did not immediately rule whether the testing would be allowed in the court-martial.
Russell has already pleaded guilty to the 2009 killings but does not agree they were premeditated. Prosecutors are trying to prove that Russell plotted the shootings in advance.