Jack D. Young, the pickup driver accused of causing Wednesday’s highway crash in Uvalde County that killed 13 congregants of a New Braunfels church, said he had been texting behind the wheel, a witness said today. “He said, ‘I’m sorry, I’m sorry. I was texting on my phone,’†said Jody Kuchler, a welder from Leakey, saying he spoke to Young, 20, while he was still pinned in his wrecked truck after the collision.  “I told him. ‘Son do you know what you just did?’ He just kept saying, ‘I’m sorry. I’m sorry,’†recalled Kuchler, 55. He said Friday that...