 After being released, he tracked her down and waited outside for 45 minutes in a rental car stocked with zip ties and weapons before murdering Marie and his mother-in-law. Marie's brother, Alex Yan, has been advocating for this new GPS measure for more than two years. This is one of the most important bills that I feel like I could have actually saved my mother and sister. The law received broad, bipartisan support in the Tennessee legislature.