The law requires all involved parties to give their information.  Transportation Code section 550.023 Duty to Give Information and Render Aid.

The operator of a vehicle involved in an accident resulting in the injury or death of a person or damage to a vehicle that is driven or attended by a person shall:

1. give the operator's name and address, the registration number of the vehicle the operator was driving, and the name of the operator's motor vehicle liability insurer to any person injured or the operator or occupant of or person attending a vehicle involved in the collision;
2. if requested and available, show the operator's driver's license to a person described by Subdivision (1);  and
3. provide any person injured in the accident reasonable assistance, including transporting or making arrangements for transporting the person to a physician or hospital for medical treatment if it is apparent that treatment is necessary, or if the injured person requests the transportation.