Satto Tonegawa ’15 was found dead in his MacGregor dormitory room Tuesday evening.

A possibly armed robber stole a laptop from a student on the fifth floor of Baker House yesterday evening at 5 p.m. The student was approached from behind and felt something stuck in his back. The assailant demanded the student’s laptop, acquired it, and then fled the scene. Though no weapon was clearly identified, the victim saw the suspect with “something shiny” as he fled, according to a police bulletin. The suspect was described as a tall black male wearing a dark raincoat and carrying a black backpack. He has not been apprehended, and nobody was injured in the incident.

Israel Ruiz SM ’01 was appointed as executive vice president and treasurer (EVPT) by the MIT Corporation on Oct. 14, a position held for five years by Theresa M. Stone SM ’76. In that position, Ruiz will be among MIT’s senior leadership, working with President Susan J. Hockfield alongside the provost and chancellor. Most members of the MIT community are familiar with the latter three positions — all of whom have direct involvement in academics or student life — but many may wonder, “What exactly does the EVPT do?”

Professor Robert J. Silbey passed away Thursday at age 71 after a battle with cancer. Silbey, a faculty member at MIT for 45 years, held several positions, including dean of MIT’s School of Science (2000–2007), director of Materials Science and Engineering (1998–2000) and head of the Chemistry Department (1990–1998).