The Bristol County district attorney yesterday defended throwing out OUI charges against a politically connected socialite who flunked four sobriety tests and two breath tests, blaming red tape for blocking prosecutors from getting the Breathalyzer report. “This case could not be proven beyond a reasonable doubt,” said DA Paul F. Walsh Jr. Walsh’s office dropped OUI charges against Suzanne Magaziner last week despite a police report alleging that she twice blew .12 on the Breathalyzer, which is above the legal limit of .08. But Walsh said his prosecutor, Roger Ferris, decided he had little chance to win the case, mainly...