That system has since been repaired, HUPD sources said, and officers regularly patrol the grounds of Radcliffe Yard.

Marlyn McGrath Lewis '70-'73, director of undergraduate admissions who works in Byerly Hall, said she felt the attack justified what she said was a "significant" expense to hire a security guard for the building.

Building managers and employees have comprehensively reviewed Byerly's security procedures in the wake of the incident, Lewis said. And those who work in the building now have a heightened awareness of the presence of strangers, she said.

But Lewis admitted that this is difficult, though, because of the public nature of Byerly Hall: Prospective students and their families show up unannounced.

Lewis said Byerly Hall is weighing the tradeoffs of "convenience and security."

"Security is a work in progress, " she said.