More from the The Mystery of Love, a two-hour PBS documentary special, airing prime time Dec. 13 across most of the country. (Check local listings.)

Meet Azim Khamisa, a Sufi Muslim father whose 20-year-old son was murdered by 14-year-old gang member Tony Hicks. As he dealt with his sorrow, Azim came to realize that there were “victims at both ends of the gun.” In his heart, he forgave his son’s murderer and began working with the murderer’s grandfather, Ples Felix. Together they formed a foundation and speak with kids about the terrible effects of violence. In the process, they have become as close as brothers. Out of tragedy has developed a loving friendship.

It's a powerful story, a perfect example of an antidote to the revenge, anger and despair that would typically dominate such a tragedy. The video below was posted on DarynKagan.com, a new online inspirational community from the ex-CNN anchor. (If you don't see the embedded video, click here.)