WASHINGTON - The lead investigator into the massacre at Virginia Tech said his team would ask tough questions, such as why the campus wasn't secured, in its inquiry.

The question has been raised frequently, Col. Gerald Massengill said on NBC's "Meet the Press," particularly since Virginia Tech was locked down in August when a gunman headed toward campus. Last week, Cho Seung-hui killed 32 people in two locations before killing himself.

The retired Virginia State Police superintendent said while there were no preconceived ideas, "we're certainly going to take a tough look" at why there was no lockdown this time.

Virginia Tech President Charles Steger said he was advised the first shooting was contained and a suspect was being questioned.

"We had no way of anticipating what was yet to come in a matter of minutes," he said.

The campus was in the process of enabling a system that immediately sends text messages to students and faculty in case of a crisis.

Steger said he expected a good number of students to return Monday.

"We have a special community here," he said. "It is very strong and very resilient and we support each other."

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