Police arrested a residential community security guard for allegedly assaulting a visitor Wednesday, Aug. 14.  Suffolk County Police said John Ruggiero, while working as a security guard at The Ranches at Mount Sinai condominium complex, located along Route 25A, allegedly denied entry to a 68-year-old man who was attempting to visit a friend Aug. 14 at around 2:55 p.m. The two men exchanged words followed by a physical altercation, during which the 68-year-old man sustained serious injuries. Police did not release the name of the other man involved in the fight.    Read the article………………………….