In 1976, four people went missing in a boat off the coast of Marshfield. While the boat turned up, the fate of the four boaters remained a mystery. Here are documents related to the search for the missing boaters, and the efforts of family members over the years to find the truth.
"This is not a Halloween prank," read the October 29, 2012, letter that came with the package containing skeletal remains from two human beings.
Dispatches from May 30 to June 2, 1967, of Coast Guard's search for Daniel and Elaine Kwiatkowski, Jana Coonan, and Daniel Poirer.
Paul and Marjorie Coonan wrote to the former Massachusetts senator, asking for forensic testing to be done on some of the evidence in the disappearance.
The letter, in response to Kennedy's query on behalf of the Coonans, outlines why the Coast Guard believes no foul play was involved in what they deemed an accident at sea.