Here’s what to know about the case.
The students’ families will have an opportunity to address the court, and many hope for answers to one major question about the brutal case: What was the motive?
© Sophie Park for The New York Times
© Ellie Smith for The New York Times
© Kenny Holston/The New York Times
© Alain Jocard/Agence France-Presse — Getty Images
© Antonio Masiello/Getty Images
© Anna Rose Layden for The New York Times
© Wilfredo Lee/Associated Press
© Martyn Goodacre/Getty Images
© Saher Alghorra for The New York Times
© Kenny Holston/The New York Times
© Kyodo News, via Associated Press
© Adem Altan/Agence France-Presse — Getty Images
© Jessica Lee/EPA, via Shutterstock
© Michael Yarish/MTV, via Associated Press
© Andrew Testa for The New York Times
© Trisha Ahmed/Associated Press
© Pool photo by Kyle Green
© Win McNamee/Reuters
© Victor J. Blue for The New York Times