From the article:
A grand jury on Monday refused to indict a Caldwell County man who killed two intruders in his driveway earlier this month.
State law gives property owners considerable leeway to defend themselves and their property, legal experts said.
"In general, the law doesn't allow you to kill somebody who has already committed a crime against you."
If I understand this correctly, the home owner did not kill the two bad guys AFTER they had committed a crime against him. The fact that the two were still in the homeowner's driveway indicates that the homeowner shot them DURING the burglary. Technically speaking, since the bad guys had yet to leave with the property with the goods, then the burglary was not yet over.
This event happened at night. Texas laws allow the use of deadly force against those committing crimes on one's property. These laws are apparently a throwback of old British laws making crimes at night all be felonies.