HUPD officers are worried that the robber may be getting more "brazen"--striking during daylight for the first time this weekend.

McNamara urged students to be on the lookout for the perpetrator, who she said "seems to fit in" with students. She said they should approach unfamiliar visitors and ask if they need help. Students should call HUPD if they are still suspicious, she said.

McNamara also urged students not to challenge the perpetrator on their own. She said that police do not want to see a repeat of last week's confrontation in Thayer, during which students wrestled with a robber and then chased him down the hall.

"Call us, let us do our job," McNamara said. "We'd rather have the robber get away than have a student injured."

Dean of Freshmen Elizabeth Studley Nathans said her office is "extremely concerned" about the incidents and has received calls from concerned parents. She has referred some of them to HUPD for more information about dorm security.

Gervasio A. Lamas '74--whose daughter was robbed in the third Matthews wave--said he was taken aback by the crime and has an appointment to speak with Nathans this morning.

"This stranger entered a room with two sleeping young women, and my daughter taking a shower who could have come back at any moment," he said. "It might have been a rape or worse. I was terrified."