The Army reservist who shot and killed five Dallas police officers last month showed symptoms of post-traumatic stress disorder after returning home from Afghanistan in 2014 and sought treatment for anxiety, depression and hallucinations, according to newly released documents from the Veterans Health Administration. Micah Johnson told doctors he experienced nightmares after witnessing fellow soldiers getting blown in half and said he heard voices and mortars exploding, according to the documents obtained by The Associated Press under the Freedom of Information Act. The patient told health care providers he had lower back pain and was avoiding "crowds of people and when in the public, scanning the area for danger, noting all the exits, everyone's actions." Johnson's mother, Delphene Johnson, previously had said her son had sought medical care from the VA for a back injury, but got no help after filling out forms and going to meetings so he "just finally gave up," she told TheBlaze, a news site founded by conservative talk show host Glenn Beck.