Oprah: Trayvon Martin Killing Is 'A Tragedy' And 'A Shame' (VIDEO)

Oprah Winfrey weighed in on the death of teenager Trayvon Martin for the first time on Wednesday, expressing her dismay at his killing and the handling of the case.

Martin was shot to death by a neighborhood watch volunteer named George Zimmerman in late February. His death, and the local police department's failure to arrest the shooter, have sparked outrage across the country.

In an interview with Extra, Winfrey said, "It is a tragedy and it is a shame that we're sitting here 33 days later and there hasn't been an arrest, or questioning of what actually happened. It's a tragedy and it is a shame and we all know it."

She identified Zimmerman as the person she would most like to interview. She also commented on the reaction to Martin's death.

"I saw some people on Twitter saying nothing has changed, the same thing's going on," she said. "Lots has changed and you know why? Because black people, white people, brown people, yellow people all over this country and all over the world are saying the same thing... it's a tragedy and it's a shame and justice needs to be served."