Presumably the dead & wounded invaders targeted that house because they believed it was the only home in Texas with no guns... then proceeded to 1) Shoot their accomplice resulting in 2) handing the resident a gun and 3) The second perp getting lethally ventilated.
While the residents might have been unarmed, they're in Texas, won't still be unarmed by sunset.
12 gauge slugs (esp. hardcast) will also work; might be survivable, definitely will "stop the threat". OTOH, unless you're expecting intruders with body armor (see bold text above) then it's impolite to start flinging 12 gauge slugs around the neighborhood.