ROUND ROCK, Texas (KXAN) -- For Dimna Contreras, a night out with her boyfriend and another couple at a family restaurant changed everything.
She ordered a beer while her boyfriend ordered a margarita. It was their first drink of the night.
"He said you're going to need to drive, this margarita is hitting me, this must be a strong margarita," Contreras said.
Contreras didn't think much of it at that point, but then things spiraled.
"I could see that his behavior was different...