Where’s my pancakes, read Rodney Bradford’s Facebook page, in a message typed on Saturday, Oct. 17, at 11:49 a.m., from a computer in his father’s apartment in Harlem. At the time, the sentence, written in indecipherable street slang, was just another navel-gazing, cryptic Facebook status update — words that were gobbledygook to anyone besides Mr. Bradford. But when Mr. Bradford, a skinny, short 19-year-old resident of the Farragut Houses, was arrested the next day as a suspect in a robbery…they became his alibi…
