A Reddit user provided information that helped identify Claudio Manuel Neves Valente as not only the suspect in the campus shooting, but also the murder of an M.I.T. professor.

© Christopher Capozziello for The New York Times

Officials identified a man from Portugal as the suspect in the deadly shooting at Brown University and the killing of an M.I.T. professor. The police said on Thursday he died from a self-inflicted gunshot.

© Christopher Capozziello for The New York Times

Bravery and cowardice are both exemplary teachers.

For the students in the Brown University review session, concerns about grades and questions about economic concepts would be forgotten in an instant.

© Christopher Capozziello for The New York Times

The Bondi Beach massacre has people fearing more anti-Jewish violence — and an Islamophobic backlash. But there are reasons to think stability will prevail.

© Matthew Abbott for The New York Times