overseas that's become an international sideshow and possibly hurting the attempt to free an american held captive. Dennis rodman in north korea. Today, he sang happy birthday to the country's brutal... See More
overseas that's become an international sideshow and possibly hurting the attempt to free an american held captive. Dennis rodman in north korea. Today, he sang happy birthday to the country's brutal dictator. Here's abc's bob woodruff with a family asking for help. ♪ Happy birthday to you ♪ Reporter: Birthday serenades rarely draw international criticism, unless you're dennis rodman singing to the dictator kim jong-un. Rodman's present, bringing a team of ex-nba players for a game. This is for his birthday. This is his gift. I love the guy. The guy is my friend, forever and ever and ever. Reporter: This is rodman's third trip to north korea. But this time his so-called basketball diplomacy is getting people angry back home. It's because of his comments yesterday on cnn attacking kenneth bae, an american missionary held prisoner in north korea for 14 months. Can you understand what he did in this country? What did he do? You tell me. You tell me why he's held captive. Reporter: Today, bae's sister told us she's furious. He is not in a position to pass judgment on kenneth bae. He's uninformed. It's outrageous. Reporter: As a mission, kenneth bae brought tour groups to north korea. He was arrested for alleged crimes against the state but there are no details beyond that. When we traveled there, kim jong un's forces kept us tightly controlled. So, strangely, dennis rodman is the closest american to the dictator. Kenneth bae's sister also told me today she once thought rodman would actually help her brother. She called his agent today. But she's not gotten any word back from them today. An anguished family. Thank you, bob woodruff.
This transcript has been automatically generated and may not be 100% accurate.