Months after their state-certified vehicle inspection station was cited by federal authorities for failing to notice defects in a bus that crashed in North Texas, killing 17 passengers, brothers Alam and Cesar Hernandez shuttered their firm. But that didn’t mean they were out of the vehicle inspection business. Instead, they opened another station in the same Houston neighborhood and continued to inspect buses like the one involved in the accident. And they did it with the approval of the Texas Department of Public Safety.