McHugh said records showed no sign of "likely violence either to himself or others" and physicians had planned to monitor and treat him for his issues as they deemed appropriate. The gunman had a clean record in terms of behavior, McHugh said.
Before joining active duty Army, Lopez served in the Puerto Rico National Guard as an infantryman, then in the 248th band and once again as an infantryman, according to the Guard. As a Guardsman, Lopez was once deployed to the Sinai Peninsula as part of an observer mission for the Camp David Accords in 2007.
Glidden Lopez Torres, who bears no relation to Ivan Lopez but identified himself as a spokesperson for the Lopez family in Puerto Rico where Ivan Lopez was born, told ABC News Lopez had been “very upset” following his mother’s death in November, particularly because he had not been allowed to spend more time in Puerto Rico following her passing. The spokesperson said that the family was not aware Lopez was being treated for any mental issues.
ABC News' Gina Sunseri and Lisa Sivertsen and freelance journalist Seema Mathur contributed to this report.