John Wayne Gacy's Sister on the Serial Killer's Last Day

Aired on 02/17/2010 | CC tv-pg
Imagine being the relative of a notorious killer. For more than 30 years, John Wayne Gacy Jr.'s younger sister, Karen, hid her connection to the man who was found guilty of murdering 33 people. Although many celebrated Gacy's execution, Karen was losing a brother. Watch the video above to learn what she said to her sibling in his final hours.

Original airdate: February 17, 2010