Failure to identify oneself to a police officer is a class B misdemeanor. If you picked up the charge when you were 17 years old, you will be defending yourself in the adult criminal courts because 17 is the age of majority in Texas for criminal proceedings. They may or may not know. In today's electronic world, they usually do though and will often contact the other agency to let them know you were picked up. But that's not always the case--especially when the offense is not very egregious.