The Manhattan District Attorney's office "declined to bring criminal charges against movie mogul Harvey Weinstein who admitted to groping a model two years ago -- though legal experts say suspects are routinely arrested on far less evidence" as reported by the Daily News: "the overwhelming majority of the experts . . . say the police complaint from Ambra Battilana Gutierrez and the subsequent recorded conversation in which Weinstein apologized for touching her breasts were enough to file charges," and "similar cases are charged every day with the same evidence or less and arrests are made on an accuser's word alone, most of the experts agreed."
Further reading that may be of interest: