Kiany DeJesus was just 11 years old when her mother was killed by her ex-boyfriend in Greenbelt, Maryland. In court Tuesday, the daughter watched him get sentenced to decades in prison for the 2014 killing — after she used social media to track him down in Mexico, where he had started a new family. Emilia Ignacio was killed in April 2014 at the hands of Juan Miguel Roman-Balderas.