Part of the value of Trace Labs is not only helping families find their loved ones but also to help information security enthusiasts to practice their open source intelligence skills. These posts categorized as Techniques or Tools such as this one contains tips for performing OSINT.
There are a few ways to get public record of any criminal activity of a person. This differs depending on the country. Sometimes multiple countries need to be checked as the person could have a record in more than one place.
United States of America