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Oprah Winfrey chose not to air a pre-taped episode of her talk show marking the 10th anniversary of the Columbine High School massacre, saying it was overly focused on the killers.

"I decided to pull the Columbine show today," Winfrey wrote on her site and Facebook page. "After reviewing it, I thought it focused too much on the killers. Today, hold a thought for the Columbine community. This is a hard day for them." The Twitter newbie also noted her decision in her feed. (You can follow TVGuide.com on Twitter, as well.)

The episode, entitled "10 Years Later: The Truth About Columbine" was scheduled to air Monday on the anniversary of the massacre, in which two high school gunman killed 12 fellow students and a teacher before turning the guns on themselves.

Columbine Task Force lead investigator Kate Battan, FBI special agent Dwayne Fuselier, Dave Cullen (author of the book Columbine) and Columbine High School principal Frank DeAngelis were all to have appeared in the program, a spokeswoman for Winfrey's show confirmed to TVGuide.com.

In the episode's place, Winfrey plans to air an episode about a mother released from prison.