The FBI obtained evidence against the teen prostitution ring allegedly operated by the Gambino crime family through a snitch who had developed a conscience as reported by Alison Gendar for the Daily News: The informant made more than 40 recordings, capturing up to 200 hours of conversations - some of the ammo behind this week's indictment of 14 wiseguys. He went to the feds and betrayed his associates because he didn't want to get in any deeper with trafficking underage girls through craigslist, a source said. The tapes include one of the Gambino crew members telling a 15-year-old prostitute how...