I somewhat agree with Hunterslife on this. The Optima as well as the Accura both have a transfer bar system. There is no way the hammer could have struck the firing pin unless the hammer WAS back AND the trigger was pulled. Even if the firing pin was protruding some closing the action would have pushed it back into the recess hole.
In any event, your friend should contact CVA and as a minimum order a new hammer spring. (they will probably just send him one). Then clean everything good. even if you have to scrub everything down with hot soapy water. Just rinse with hot water and dry then spray with a quality gun oil.