Isaias, a Latino and a former US Marine, is 35. He is a husband and a father of two.

In his twenties, he was convicted of the crime of having had sex with a 16-year old. After serving 5 years in prison, he has now spent 2 years living in Miami's tent city for sex offenders, which is located under a bridge.

Local law prohibits people like him from living within 2,500 feet of anywhere where children congregate - be it schools, libraries, or parks. This prevents him from living with his wife and family. The only place in Miami where he can live is in a tent, under a bridge, in a community of people with similar or worse backgrounds.

BBC has the disturbing story.