No one was killed in Texas with an assault rifle either. I carried an assault rifle in Vietnam, and they are not available to the general public. To obtain one, an individual has to apply for a special permit - expensive, and difficult to get - for an automatic weapon, and in all my acquaintances, I know of only one individual who has succeeded - and he is a full bird Colonel in the Air Guard.
The news media, which is by and large anti-gun, can’t tell the difference between one rifle and another; but if it has a pistol grip and a non-wood foregrip and is semi automatic, they call it an assault weapon; the same exact caliber weapon with a wood stock is not called that.
The shooter in Texas had a semi automatic rifle. But the media, thinking that no one “needs” one, goes out of their way to emphasize how scary it is. And all the anti-gun crowd proposes all sorts of new laws to confiscate such rifles, none of which would have stopped this or any other shootings. But hey - we made drugs illegal, and that really stopped the flow of drugs - right?
Information indicates this may have been over a domestic dispute. Getting protection for those who were the subject of the shooter’s anger might have been more effective. so also, mental health intervention, an area of an very poor track record of funding and intervention.