A Fort Lauderdale business owner intervened in an armed robbery at a Family Dollar store Wednesday night in which the victim was pistol-whipped with a stolen gun and one of two suspects escaped. Nicolas Deas, 20, of Fort Lauderdale, was arrested on one count each of robbery with a firearm, aggravated assault with intent to commit a felony, aggravated battery with a deadly weapon, grand theft of a firearm and carrying a concealed firearm, jail records show. Deas and another unidentified man approached the Family Dollar in the 1900 block of Northwest Ninth Avenue about 10 p.m.