While his onetime screenwriting partner Quentin Tarantino was preparing this week for the release of his latest movie, Roger Avary was pleading guilty to charges of vehicular manslaughter and drunken driving, The Ventura County Star reported. Mr. Avary, who in 1995 won an Academy Award for writing the screenplay for “Pulp Fiction” with Mr. Tarantino, entered the plea on Tuesday in Ventura County Superior Court in California. The charges stem from an accident on Jan. 13, 2008, when Mr. Avary’s car hit a telephone pole in Ojai. A passenger, Andreas Zini, was killed in the crash and Mr. Avary’s wife, Gretchen, was injured. Mr. Avary pleaded not guilty to the charges in December but has apologized for the accident. He remains free on bail and is scheduled to be sentenced on Sept. 29.