A Dorset, Vt., man has been charged in connection with a crash in June that killed actor Treat Williams, who was thrown from his motorcycle when an SUV turned left into his path, officials said.
Ryan M. Koss, 35, was charged Tuesday with grossly negligent operation resulting in death after the office of Bennington County State’s Attorney Erica Marthage completed an investigation into the June 12 crash, according to a statement from Vermont State Police.
Koss turned himself in at the State Police’s Shaftsbury barracks after authorities contacted him Tuesday evening, according to the statement. Koss was processed and released and is scheduled to be arraigned in Vermont Superior Court in Bennington on Sept. 25.
It was unclear Wednesday whether Koss had hired a lawyer to represent him.
Koss serves as managing creative director of the Dorset Theatre Festival, and his husband, Will Rucker, is the festival’s executive artistic director, according to the festival’s website and a story about the couple published in May in the Brattleboro Reformer.
Koss and Rucker did not respond to requests for comment on Wednesday.
Williams performed at the festival in 2017, one year before Koss and Rucker became part of its leadership team, starring with Stephen Adly Guirgis in David Mamet’s play “American Buffalo,” according to the festival site and reports published in Playbill and other publications.
Williams, 71, lived in Manchester Center, Vt., and had a career in theater, film, and television that spanned five decades and more than 100 roles, from charismatic hippie leader George Berger in the 1979 film adaptation of the counterculture Broadway musical “Hair,” to a widowed single dad in the WB series “Everwood,” and a recent recurring part on the CBS police drama “Blue Bloods.”
Prosecutors say Koss was driving a 2008 Honda Element SUV that turned into the path of Williams’ motorcycle on Vermont Route 30 just before 5 p.m. on June 12.
Koss allegedly stopped the SUV, signaled a left turn, and turned toward a parking lot and into the path of a northbound 1986 Honda VT700c driven by Williams, who could not turn away in time to avoid a crash, State Police said.
The crash left Williams with critical injuries. He was airlifted to Albany Medical Center in the New York capital, where he was pronounced dead. A New York coroner determined that the cause of death was severe trauma and blood loss, State Police said.
Koss sustained minor injuries but was not hospitalized, State Police said.
Jeremy C. Fox can be reached at jeremy.fox@globe.com. Follow him @jeremycfox.