It's ragged, ripped and unsteady, but you can call it the city's $4.5 million chair. Former New York City Detective Anderson Alexander was sitting in it in Brooklyn's 73rd Precinct on Jan. 1, 2002, when his partner handed him his gun so the partner could interview a suspect. Alexander leaned back to put the gun in his waistband, but the back of the chair gave way, his finger slipped and the 9-mm. Smith & Wesson fired a bullet into his left knee. Now, despite the best efforts of city lawyers to portray the 11-year veteran as a klutz, a...