STATEN ISLAND, N.Y. — A 34-year-old woman is accused of trying to grab a police officer’s firearm from his holster during a wild melee at Faber Pool in Port Richmond last week. A video clip of the final seconds of that chaotic scene showing the officer shove the woman, who then topples down a flight of concrete stairs, was posted on social media and provided to the Advance/SILive.com by a reader. Authorities were summoned to the pool around 5:30 p.m. on Friday, June 28, said a spokesman for the NYPD. Witnesses told the Advance/SILive.com the altercation began between kids then...