http://www.dmv.org/tx-texas/drivers-license.php
If you don't mind show us where on the Texas DMV website you can input a persons license plate number and only there license number and obtain there personal information.
I see where you can order a background check but this report only shows if the person has a criminal record and the status of the cases pending or resolved. It is a way of verifying if a job applicant has a felony record. It will not give you there present address, telephone number or any other type of contact info.
It is not that I don't believe you but there is a little thing called right to privacy where by a state has to protect its citizens against unreasonable search. If by chance you’re a cop or involved with the government in some capacity then perhaps you have access to info the rest of us can not easily get. The average citizen is not going to be able to walk into the DMV with a license plate number and a story and obtain any personal contact information for another person.