That news prompted Ron Paul to post this tweet to social media:

Reports have said Kyle was helping Eddie Routh, his alleged shooter, through a treatment called "prolonged exposure therapy." According to the Department of Veterans Affairs, sufferers of post-traumatic stress disorder "practice approaching situations that are safe but which [they] may have been avoiding because they are related to the trauma."

Ron Paul elaborated on the comments in a post on his Facebook page later in the day.

“As a veteran, I certainly recognize that this weekend’s violence and killing of Chris Kyle were a tragic and sad event. My condolences and prayers go out to Mr. Kyle’s family," Paul said. “Unconstitutional and unnecessary wars have endless unintended consequences. A policy of non-violence, as Christ preached, would have prevented this and similar tragedies.”

Reactions to Paul's comments were critical, with many echoing conservative commentator and former Reagan speechwriter John Podhoretz, who tweeted that the remarks were "appalling."