Manhattan District Attorney Cyrus R. Vance, Jr., announced the conviction of JONATHAN GONZALES-ALVAREZ, 23, for fatally stabbing a security guard at a restaurant and bar in Washington Heights after the bar’s employees asked him to quiet down. A jury in New York State Supreme Court found GONZALES-ALVAREZ guilty of all of the charges in the indictment: Murder in the Second Degree and Gang Assault in the First Degree. The defendant will be sentenced on February 15, 2012.