BENNINGTON, Vt. – A Vermont man who was driving a car and collided with actor Treat Williams, causing the “Everwood” actor’s death in June, has been charged in the fatal accident, prosecutors said Tuesday.
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According to a news release from the Vermont State Police, Ryan M. Koss, 35, of Dorset, was charged with “grossly negligent operation with death” in the June 12 accident that killed Williams, 71, who was riding his motorcycle.
The Medical Examiner’s Office determined that Williams died of severe trauma and blood loss as a result of the crash, the release stated.
The charge was recommended by the office of Bennington County State’s Attorney Erica Marthage, which completed its review on Tuesday.
Koss voluntarily met with authorities and was processed on the charge and released, Deadline reported. He will appear for arraignment on Sept. 25, the entertainment news outlet reported.
The appearance will be held in the Criminal Division of Vermont Superior Court in Bennington, state police said in its news release.
Police said a driver, identified as Koss, cut off Williams as he operated his motorcycle near Dorset, WCAX-TV reported. Williams collided with a 2008 Honda Element and was thrown from his motorcycle, state police said in its news release.
Williams was airlifted to Albany Medical Center in Albany, New York, where he was pronounced dead, WPTZ-TV reported. Koss was checked by medical personnel at the scene for minor injuries and was not transported to a hospital.
Treat Williams, ‘Everwood,’ ‘Prince of the City’ star, killed in motorcycle accident
Williams played the lead on “Everwood” for four years, a show that helped launch the careers of Chris Pratt, Emily VanCamp and Gregory Smith, Deadline reported.
His breakthrough role came in 1979 when he starred in “Hair,” a film based on the 1967 Broadway play. The role earned him a Golden Globe nomination, the entertainment news website reported.
He also appeared in “Prince of the City” (1981), “1941″ (1979), “Once Upon A Time In America” (1984), “Dead Heat” (1988), “Things to Do in Denver When You’re Dead” (1995) and “Deep Rising” (1998), according to IMDb.com.
Williams played Mick O’Brien on the Hallmark Channel series Chesapeake Shores from 2016 to 2022 and has played a recurring role as Lenny Ross on “Blue Bloods” since 2016, according to The Hollywood Reporter.
He was nominated for an Emmy in 1996 for his role in “The Late Shift,” the entertainment news website reported.

Actress Rita Moreno actor Treat Williams on set of the Warner Bros. movie"The Ritz" in 1976. (Photo by Michael Ochs Archives/Getty Images)

Treat Williams, Annie Golden, Beverly D’Angelo, Milos Forman, cast of the film ‘Hair’ attend Cannes Film Festival May 10, 1979. (Photo by Gilbert TOURTE/Gamma-Rapho via Getty Images)

Treat Williams and Andy Warhol during Andy Warhol Unveils Poster For "Some Men Need Help" at Chelsea Central Restaurant in New York City, New York, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images)

LOS ANGELES – APRIL 2: Portrait of cast members (from left) Henriette Mantel (as Henriette Campbell), Ross Malinger (as Michael DeRuzza), Shelley Long (as Susan DeRuzza), Treat Williams (as Jack Harold), Teri Garr (as Paige Turner), George Wyner (as Artie Cohen, in the CBS television sitcom, GOOD AVICE. Premiere broadcast April 2, 1993. (Photo by CBS via Getty Images)

Treat Williams and Brooke Adams (Photo by LGI Stock/Corbis/VCG via Getty Images)

HOLLYWOOD – JULY 13: Actor Treat Williams attends the WB Network’s 2002 Summer Party at the Renaissance Hollywood Hotel on July 13, 2002 in Hollywood, California. (Photo by Robert Mora/Getty Images)

Treat Williams, "Everwood" and John Glover, "Smallville", at "The WB 2003 Winter TCA Tour Party" at Hollywood and Highland in Los Angeles, Ca. Saturday, Jan. 11, 2003. Photo by Kevin Winter/ImageDirect

BEVERLY HILLS, CA – NOVEMBER 6: Actor Treat Williams speaks at the Cure Autism Now’s 10th Anniversay Gala at the Beverly Regent Wilshire Hotel on November 6, 2005 in Beverly Hills, California. (Photo by Michael Buckner/Getty Images)

GLENDALE, CA – MAY 23: Actor Treat Williams performs on stage at weSPARKLE Take V "Broadway/Comedy Tonight" at the Alex Theatre on May 23, 2006 in Glendale, California. (Photo by David Livingston/Getty Images)

PARK CITY, UT – JANUARY 21: Actor Treat Williams attends "Howl" Premiere during the 2010 Sundance Film Festival at Eccles Theatre on January 21, 2010 in Park City, Utah. (Photo by Jemal Countess/Getty Images)

PARK CITY, UT – JANUARY 22: Actors Treat Williams (L) and William H. Macy (R) attend Creative Coalition’s 2012 Spotlight Initiative Gala Awards Dinner at The Supper Club by Stella Artois during the 2012 Sundance Film Festival on January 22, 2012 in Park City, Utah. (Photo by Frazer Harrison/Getty Images for Stella Cafe)

NEW YORK, NY – SEPTEMBER 27: "Once Upon A Time In America" cast members James Woods (L) and Treat Williams attend the 52nd New York Film Festival at Walter Reade Theater on September 27, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images)

NEW YORK, NY – APRIL 22: Treat Williams speaks during Tribeca Talks After The Movie: By Sidney Lumet during the 2016 Tribeca Film Festival at SVA Theatre on April 22, 2016 in New York City. (Photo by Cindy Ord/Getty Images for Tribeca Film Festival)

BEVERLY HILLS, CA – AUGUST 02: Actor Treat Williams of ”Everwood’- A 15th Anniversary Reunion’ speaks onstage during the CW portion of the 2017 Summer Television Critics Association Press Tour at The Beverly Hilton Hotel on August 2, 2017 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)

NEW YORK, NY – SEPTEMBER 21: Actor Treat Williams attends The Academy of Motion Picture Arts and Sciences and Metrograph special screening of Hair with Treat Williams at Mission Chinese on September 21, 2019 in New York City. (Photo by Lars Niki/Getty Images for The Academy Of Motion Picture Arts & Sciences)

NEW YORK, NEW YORK – DECEMBER 12: Treat Williams and Brian D’Arcy James attend the Robert F. Kennedy Human Rights Hosts 2019 Ripple Of Hope Gala & Auction In NYC on December 12, 2019 in New York City. (Photo by Mike Pont/Getty Images for Robert F. Kennedy Human Rights)