The police have arrested a 16-year-old suspect in the fatal stabbing of a radio journalist, George Weber, who was found in his Brooklyn apartment last Sunday, law enforcement officials said. The teenager, who lives in East Elmhurst, Queens, was arrested in Middletown, N.Y., on Tuesday night, the officials said. Charges were pending. The officials said that Mr. Weber, 47, and the teenager apparently met through the Craigslist Web site. One of the officials, who declined to be identified because he was not authorized to speak about the case, said that Mr. Weber had posted advertisements on Craigslist and messages on...