Video shows the final moments before a 20-year-old texting driver killed 13 elderly churchgoers
A still image of aerial video is shown of an accident scene involving a Texas church bus carrying senior citizens which crashed head-on with another vehicle about 80 miles (130 km) west of San Antonio, Texas, U.S., March 29, 2017. Courtesy WOAI/KABB/Handout via REUTERS

HOUSTON — A witness says the driver of a pickup truck that collided with a church minibus in rural Texas, killing 13 people, acknowledged he had been texting while driving — a development that highlights the dangers of sending messages on smartphones while behind the wheel. RELATED: A new update reveals texting and driving was the…