"CBS Evening News" headlines for Wednesday, March 24, 2021

Here's a look at the top stories making headlines on the "CBS Evening News" anchored by Margaret Brennan.

Video Transcript

MARGARET BRENNAN: Tonight, the search for a motive in that Colorado massacre, hours before the alleged killer appears in court. Sources tell CBS News, investigators are narrowing in on possible mental illness, as they dig in to the 21-year-old shooter's bizarre behavior and his past, what he asked police when they arrested him, and why he once described blacking out while attacking a classmate. Plus, remembering the fallen. The beloved supermarket employee and the co-worker who was the love of her life.

Taking point. The Biden administration allows in a television camera for the first time to get a look inside a holding facility for migrant children, as President Biden puts his vice president in charge of the growing crisis at the border.

Progress stalled. With coronavirus infections rising in nearly half the country, the nation's top infectious disease expert says we still haven't turned the corner on the pandemic. The move from the White House tonight to get students back in school.

Moment of attack. The up close images of a fallen Capitol Police officer under assault. Why these pictures could reveal what killed him. And the new court filings-- did extremist groups coordinate the January 6 riot?

Our series, Women and the Pandemic. The hidden health risks from all those delayed cancer screenings. Could you have missed an important diagnosis because of COVID?

And from mega hit to music history.

LABELLE: (SINGING) Voulex-vous coucher avec moi, ce soir?

MARGARET BRENNAN: How this number one song is now part of America's permanent musical record.

[THEME MUSIC]

- This is the "CBS Evening News With Norah O'Donnell." Reporting from the nation's capital.