If his wife is able to own guns, then there is no reason why there cannot be guns in the home.

The article I read did not go into detail about his medical condition. If he spent time in a mental ward due to PSD, then he may not be able to own weapons. A lack of a violent actions in the past does not mean it would not be in the future.

I find it difficult to believe that this man would be singled out for no apparent reason. My best guess is he was found to be unstable by those that have dealt with him medically and knows his history.

People with PSD have caused death and injury to many over the years, There may be reasons the media was not aware of and HIPPA keeps medical records private so the full story may never be known.