Motive sought in Texas mass shooting

Authorities are trying to figure out why a man stopped for a traffic violation in northwest Texas went on a shooting spree as he sped down highways Saturday. The latest U.S. mass shooting left seven people dead.

Twenty-two more were wounded in the rampage outside Odessa, including three officers. The alleged gunman was killed by police, bringing the total death toll from the incident to eight. The deceased ranged in age from 15 to 57.

It was the second mass shooting in Texas in a month.