It has not been determined what killed 43-year-old Capt. Bruce Kevin Clark, a nurse stationed in Afghanistan. Relatives had said Clark's wife saw a bullet hole in a closet behind him after he collapsed during the Skype session on April 30. They also said he did not show signs of discomfort before suddenly collapsing.
Authorities said Monday they did not find evidence of foul play. An initial probe showed only that Clark broke his nose when he fell forward. An autopsy is being done to determine the cause of death. It's not clear how the bullet hole got in the closet.
Clark's relatives said the Skype link remained open for two hours while family and friends in the U.S. and Afghanistan tried to get help.
Clark joined the Army in 2006 and was stationed in Hawaii before he was assigned to the medical center in El Paso. He deployed to Afghanistan in March. He is survived by his wife and two daughters, aged 3 and 9.
The Associated Press contributed to this report.