Illinois state prosecutors have charged a 16-year-old with murder in last week’s shooting death of Amadou Cisse, who was a graduate student at the University of Chicago, the Chicago Tribune reported today.

The alleged perpetrator, Eric Walker, was charged as an adult with first-degree murder and armed robbery, among other offenses. The police said he was involved in two other attacks on Chicago students and a staff member on the same night Mr. Cisse died. All three incidents occurred on or just off the campus, in the Hyde Park neighborhood of Chicago. Charges against other suspects are pending, the police told the Tribune.

University officials, who have been criticized for waiting until the next morning to notify students of the crimes, have set up a new police substation on the campus, increased police patrols, and extended the hours of a van service for students and employees, the Tribune reported.

The institution is also reviewing its security and emergency-notification procedures. Many administrators at other colleges are doing the same, discussing how to issue alerts that are not only fast but also useful. —Sara Lipka