She has been trained by the American Association of Suicidology to study the psychological aspect of suicide.The Journal Sentinel reported the researchers will interview relatives and friends of active-duty Marines who died by suicide between 2010 and 2012. Last year 48 active duty Marines died by suicide, including six suspected suicides that have yet to be confirmed.Other branches of the military have also experienced a recent increase in suicides. The Army Study to Assess Risk and Resilience in Servicemembers is collecting information on Army suicides.