already in jail for prostitution, derwin smith and the federal prosecutors throw the book at him. >> a 12-year-old girl was entized into prostitution by a 42-year-old man. >> reporter: it's known smith took the girl to atlantic city. it is here that they got into an argument. she wanted him to take her home. he refused and threatened to shoot her with a gun, unless she shut up. >> mr. smith was involved in running essentially a brothel that he had multiple prostitutes working for him. >> reporter: when smith left the girl alone here in room 309 the girl didn't answer his phone calls but she did have time to call her mom. police soon arrived. >> it's fortunate that the girl was found so quickly and we were able to get the support she needed. >> reporter: during the 12 days with smith, it is known that she was promised a large home and a top spot among his prostitutes. >> there was eight kids here. six of them girls. >> reporter: he never told neighbors what he did for a living nor his name. they only knew him as smithy. >> there was a lot of yelling sometimes. >> reporter: smith is in