KEY POINTS
  • "I believe the No. 1 civil right is to be free from harm," Howard Safir says.
  • In order to do that in a civilized society, "we maybe have to give up a little bit of our privacy," he says.
  • The Las Vegas concert massacre is the deadliest mass shooting in U.S. history.

Americans may need to give up some of their freedoms to protect against attacks such as Sunday night's Las Vegas concert massacre, said Howard Safir, former New York City police commissioner.

"Let me preface what I'm about to say, so the civil libertarians understand what I'm saying, I believe the No. 1 civil right is to be free from harm. And in order to do that in a civilized society ... we maybe have to give up a little bit of our privacy," Safir told CNBC's "Squawk on the Street" on Monday.