Couple of thoughts for ya there Ivy League Lite...
1. Did you search any other...you know...actual news sites about this event?
2. Did you read the story from the link inside the source you posted?
No? (Of course not). If you had you might have noticed that your story said your hero had a concealed carry permit. Not unusual in TX. But I think even someone with your limited intelligence would agree that an AR-15 is not a "concealed carry" type of weapon? (I'm sure the only reason you posted this because of the AR-15 reference.)
The original story does not mention the type of weapon the homeowner fired. So where did your "source" get it from? Did they make it up?
There is also no mention of weapon types in this report of the same incident:
http://cityofhouston.news/investigation-into-fatal-shooting-at-400-glenburnie/
BTW...here a couple of other wonderful gun related stories for you:
http://www.newschannel5.com/news/man-3-year-old-injured-in-accidental-shooting
http://wiat.com/2017/05/08/2-year-old-shot-monday-morning-in-birmingham/
I am sure that first story will make you so proud...1 shot...TWO hits! Of course he hit himself and a 3 yr old....but that's irrelevant...right?