Transcript for 9 Year Old Girl Suspended From School for Act of Kindness
And finally tonight, when does an extraordinary act of kindness trump a rule at school? A 9-year-old suspended from school until it was decided that love is better. Reporter: Delaney clements and Kamryn Renfro call themselves bffs. Best friends forever. Childhood playmates dealt some very adult news three and a half years ago when Delaney got sick. My cancer is called neuroblastoma. Reporter: There was relapse after relapse. Each time, chemotherapy took all her hair. And now I'm going to lose it again because of this. Reporter: But Kamryn wasn't going to let her bff be bald alone. I didn't want her to be the only one that's getting her hair shaved. Reporter: A little girl's bold move that came with a big price. Like many schools, her Colorado school has a dress code. Shaved heads are not allowed. And she was told not to return until she had hair. But after Kamryn's mom wrote about it online, a national firestorm erupted. And last night, the school board apologized, allowing Kamryn back, saying, "Compassion and selfless acts of courage are to be commended and encouraged." And now, other selfless acts for Delaney are springing up one head at a time. The families, inundated by countless messages from strangers. Like, now that's a true friend. Reporter: A lesson in friendship, and America strong. Cecilia Vega, ABC news, los Angeles. We're so glad you were with us tonight. We're always here at abcnews.com. "Nightline" later. And I'll see you again tomorrow night.
This transcript has been automatically generated and may not be 100% accurate.