"From day one, he's always called me 'dad.'"

Peter Mutabazi didn't have a good childhood. He grew up in Uganda, "the poorest of the poorest." He ran away from home at the age of 10 and became a street kid. Mutabazi told Fox 46 WJZY that it wasn't until a stranger took him in and got him into school that he realized his calling.

"How can I not give back?" he asked.

Mutabazi eventually moved to the United States and became a citizen. He became a foster parent while living in Oklahoma in 2017. He told the local news station that he was worried that being a 'single man' would make him ineligible. Fortunately, that wasn't the case at all. To date, he's fostered 12 children.

On January 16, 2018, Muatbazi received a call from foster care worker Jessica Ward asking if he could take a boy named Tony for the weekend.

Tony had been in the foster care system since the age of 2, and at the age of 4, he was adopted by a couple in Oklahoma. For unknown reasons, when Tony was 11, his adoptive parents left him at a hospital. They never returned. Muatbazi couldn't believe the young boy's story.

"By that time, I was crying. I thought, 'Who would do that?'" he recalled to Good Morning America. "Once I knew the parents' rights were signed off and he had nowhere to go, I [knew] I had to take him."

After meeting Tony, Mutabazi decided to legally become his father.

"I had the room, the resources, so I had no reason to let him go," Mutabazi explained. "For what someone did for me I wanted to do something for someone else."

Mutabazi and Tony recently moved from Oklahoma to Charlotte, North Carolina. On November 12, they legally became father and son.

"He's the nicest, smartest kid I've ever had," Mutabazi gushed to GMA. "From day one, he's always called me 'dad.' He truly meant it and he looks up to me. He's proud to show me at school and say, 'Hey, he's my dad.' That's something that I love about him."

Mutabazi said he and Tony enjoy watching movies, playing board games, reading books, and bicycling together. They're looking forward to welcoming a new foster child to their home in the near future.