A University of Alabama frat boy has been the center of an online frenzy after being arrested for allegedly beating up his ex-girlfriend. And in a twist, the victim’s dad, a Long Island cop, is also facing charges after he showed up the next day to allegedly threaten his daughter’s attacker. Ryan DellaFranco allegedly attacked his 19-year-old ex inside his off-campus Tuscaloosa apartment near the college’s Bryant-Denny Stadium, according to the Tuscaloosa Police Department. Ryan DellaFranco, 19, has been charged after a domestic dispute last weekend, police said. Tuscaloosa Police “He slammed her head into a toilet and was over top of her choking her,” a texter, only named as Ava, claimed in a Snapchat conversation circulating on X .  “She hit him in the balls and grabbed her phone and ran away…He chased her and broke into her apartment.”  This alleged violent encounter happened on Sunday, according to Tuscaloosa police.…