Ft. CAMPBELL, Ky. (WZTV) — A Ft. Campbell solider has been arrested and charged with murder for allegedly killing his pregnant wife. A spokesperson says the incident happened on base on Sept. 27. Sgt. 1st Class Joseph Santiago, 33, was taken into custody on Sept. 28 for the death of Meghan Santiago. He's been held at the Grayson County Jail pending an investigation by the U.S. Army Criminal Division. Santiago was formally charged with murder on Wednesday.