Why did someone want Texas couple Ted and Corey Shaughnessy dead?

When wealthy Austin jewelers Corey and Ted Shaughnessy are attacked by intruders in their own home, investigators initially wondered if it was a robbery gone wrong. The answer was more sinister than anyone could have expected.    

In a sprawling suburban home in Austin, Texas, 55-year-old Ted Shaughnessy, and his wife Corey were asleep, when in the middle of the night, they were awoken by home invaders. When Ted went to check out the scene, he was faced with a barrage of gunfire.