The woman who infamously drowned her kids in a lake -- and blamed a black man -- has since led a dangerous life in prison

A South Carolina woman who infamously drowned her two young sons has not taken to life in prison well, reports say. Susan Smith, now 46, lied in 1994 when she said an African-American man stole her car while her young sons were inside. Police eventually figured out that this was a complete fabrication and Smith confessed…