Cardiff and Vale of Glamorgan coroner Dr Lawrence Addicott decided against an inquest after a post-mortem examination because Dr Williams' death was natural causes.
Before witnesses began giving evidence, Coroner for Cardiff and the Vale of Glamorgan, Lawrence Addicott, told the jury of seven men and three women, that no one was "on trial" and there were no sides.
"Even if he feels the U.S. is in an unjustified war, this defendant is not going to be able to show a threat was immediate because these soldiers were on U.S. soil and unarmed, " said Jeff Addicott, director of the Center for Terrorism Law at St.