_ Kidney donor to family: Lie if you have to _
John Hembree was about to change a man's life - a man he had only met once before. David Edwards was in desperate need of a kidney transplant. One day, he opened his mailbox to find a letter from John that said:
"I wanted to make sure all the results were final before asking you this question. I have a 53-year-old kidney. Would you like to have it?"
Check out the video above for the rest of John and David's powerful story.
Watch Evening Express 5-7 p.m. ET on HLN.