Ninety nine percent of people can be traced through their social security number. A search using the number will get you information of not only the person's name, address and date of birth but even aliases, other names, previous addresses and other important details. This makes it easy for people to lookup peoples criminal records by their social security numberonline.
The social security number of the person is first entered into a National Investigative Database and primary information is derived from here. Most people whose numbers are entered this way do not even know about it as it is very simple and anyone who knows the number can find out these details. The Government wants to keep every record of the movements of the person and hence it is generally up-to-date. Also most employers ask for the SSN so that they can make a background checkand hence many people know the social security number of others with whom they are in contact.
Most organizations have a record of the SSN of their employees. The first thing a person does if he is a newcomer to the country is to apply for a SSN as it is necessary for any transaction. Hence it is easy to find a persons criminal history by SSN. To do a social security number trace all you have to do is enter the persons SSN into the public record database and hit search. After you hit search the database will then show you all of the details about this person such as criminal history records, address, birth date and many more records of the person.