Complex sentence: In the 2002 case "Board of Education v. Earls", the majority opinion by Justice Clarence Thomas used "Vernonia" as a precedent and expanded it to allow drug test to all students who are engaged in extracurricular activities.
Split into simpler sentences: In the 2002 case "Board of Education v. Earls", the majority opinion by Justice Clarence Thomas. He used "Vernonia" as a precedent and expanded it to allow drug test to all students who are engaged in extracurricular activities.