Mary Jo Kopechne
Mary Jo Kopechne, 28, died when a car driven by Senator Edward Kennedy went off Dike Bridge into Poucha Pond on Chappaquiddick Island late on July 18, 1969. Her death was attributed to drowning. Kennedy reported the crash the next morning and pleaded guilty on July 25, 1969, to leaving the scene of an accident causing injury. A 1970 grand jury returned no indictments.
- Status
- Conviction
- Type
- Suspicious Death
- Date
- July 18, 1969
- Location
- Chappaquiddick Island, Massachusetts
- Age
- 28
- Gender
- Female
- Decade
- 1960s
- Open
- Partly resolved
- Charges or trial
- ClosedConviction
At least one person was convicted in connection with the case.
Case background and investigation
Mary Jo Kopechne was born on July 26, 1940, in Wilkes-Barre, Pennsylvania. According to her Wikipedia biography, she worked as a secretary and political campaign specialist and was one of the so-called Boiler Room Girls, a group of staff members on Robert F. Kennedy's 1968 presidential campaign who tracked how Democratic delegates intended to vote. She was 28 years old, a little more than a week short of her 29th birthday, when she died.
On July 18, 1969, Kopechne attended a gathering at a rented cottage on Chappaquiddick Island, off Martha's Vineyard, that History.com describes as a reunion for women who had worked on the 1968 campaign. She left in an Oldsmobile driven by Senator Edward M. Kennedy of Massachusetts. The car went off the wooden Dike Bridge, which had no guard rails, and came to rest submerged in Poucha Pond. Kennedy got out of the car; Kopechne did not. Kennedy said he left the party at about 11:15 p.m. and took a wrong turn, according to ABC News. Kopechne's Wikipedia biography notes that a deputy sheriff, Christopher Look, testified that he saw a car he believed to be Kennedy's at about 12:40 a.m. on July 19.
Kennedy said he tried to reach Kopechne, returned to the cottage, and went back to the bridge with friends for another attempt, according to History.com. He did not report the crash to police until the following morning, roughly ten hours later. By then the car had been noticed and her body recovered shortly before 9 a.m. on July 19. The medical examiner, Dr. Donald Mills, concluded that she drowned, the Martha's Vineyard Times reported. The diver who recovered her body, John Farrar, disputed that view and testified that he believed she had survived for a time in an air pocket and suffocated. No autopsy was performed before burial.
On July 25, 1969, Kennedy pleaded guilty to leaving the scene of an accident causing bodily injury. He received a two-month suspended jail sentence, and History.com reports that his license was suspended for a year. Massachusetts authorities petitioned to exhume Kopechne's body for an autopsy, but a Pennsylvania judge denied the request in December 1969, siding with her parents, who opposed it.
An inquest was held in Edgartown in January 1970 before Judge James A. Boyle. According to the Wikipedia account of the incident, Boyle found probable cause to believe that Kennedy had operated the vehicle negligently and that this appeared to have contributed to Kopechne's death, but no arrest warrant was issued. A grand jury that examined the case returned no indictments on April 6, 1970. Kennedy was never charged with any offense beyond leaving the scene.
Kopechne is buried in Larksville, Pennsylvania. Kennedy remained in the United States Senate until his death in 2009. The exact timing of the crash and the question of how long Kopechne survived in the car were disputed in testimony and were never settled by a court.
Timeline
-
July 26, 1940Mary Jo Kopechne is born in Wilkes-Barre, Pennsylvania.
-
1968Kopechne works on Robert F. Kennedy's presidential campaign as one of the Boiler Room Girls.
-
July 18, 1969Kopechne leaves a gathering on Chappaquiddick Island in a car driven by Senator Edward Kennedy; the car goes off Dike Bridge into Poucha Pond.
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July 19, 1969Her body is recovered from the submerged car shortly before 9 a.m.; Kennedy reports the crash to police after 10 a.m.
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July 25, 1969Kennedy pleads guilty to leaving the scene of an accident causing injury and receives a two-month suspended sentence.
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December 1969A Pennsylvania judge denies a petition by Massachusetts authorities to exhume Kopechne's body for an autopsy.
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January 1970An inquest is held in Edgartown before Judge James A. Boyle.
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April 1970The inquest transcript and Judge Boyle's report are made public.
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April 6, 1970A grand jury returns no indictments.
Sources
References used for this entry. ColdCaseIndex is an index of public information. To report an error, email info@coldcaseindex.com.
About this entry
This case is recorded as conviction and is kept in the index for its historical and investigative significance. At least one person was convicted in connection with the case.
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Entry last updated November 10, 2026.
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- APA
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{{cite web |url=https://coldcaseindex.com/cases/mary-jo-kopechne/ |title=Mary Jo Kopechne |website=ColdCaseIndex |date=2026-11-10 |access-date=}}
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