NEW YORK (AP) — A white police officer who shot an unarmed, black teenager in the bathroom of his New York City apartment is expected to offer his first public account of the slaying on Friday at his department disciplinary trial. Officer Richard Haste initially faced a criminal manslaughter charge in the 2012 death of 18-year-old Ramarley Graham, which became another flashpoint for outrage over police use of deadly force against black men. Federal prosecutors also declined to bring charges, saying there was no evidence to refute Haste's claim that he shot the teen because he mistakenly believed he was reaching for a gun.