Shooting in theater.

Reeves was a retired cop that lost his temper when the man in front of him was texting during the previews of the movie. 

The two had gotten into an argument during the Lone Star movie previews because Oulson was texting his daughter. Reeves left and what people assumed would be him grabbing a manager. 

Instead, after Reeves returned very angrily, the two got into another argument resulting in Oulson throwing a bag of popcorn at Reeves. He reacted by shooting Ouslon. 

Reeves was charged with second degree murder. 

Something like this could be simply resolved, but turned a whole different direction for no reason. A man left dead and his wife injured after raising her hand in front of the bullet. 

http://www.cnn.com/2014/01/14/justice/florida-movie-theater-shooting/index.html?c=homepage-t