Original sentence: Police checked the car's license plate and saw that it was registered to Kennedy.The three men subsequently crossed back to Chappaquidick Island on the ferry, where Kennedy made a series of phone calls from a payphone by the crossing to his friends for advice
Edited sentence: He interpreted this to mean that Kopechne had survived for a while after the initial accident in the air bubble, and concluded that   Police checked the car's license plate and saw that it was registered to Kennedy.The three men subsequently crossed back to Chappaquidick Island on the ferry, where Kennedy made a series of phone calls from a payphone by the crossing to his friends for advice; he again did not report the accident to authorities