Perhaps the most interesting is the mysterious death of Jane McCrea. Jane was the daughter of a Presbyterian minister from New Jersey, and in July 1777 was living with her older brother outside Saratoga, New York.

Her brother was called up by the local militia, and her fiance was a loyalist posted at the recently re-captured Fort Ticonderoga, so she made her way towards British lines.

While resting in the home of another loyalist, Sara McNeil, an Indian scouting party attached to General Burgoyne's advancing forces raided the village of Fort Edward, killing a patriot family and taking Jane McCrea prisoner.

What happened next became the stuff of folklore, and even repeated exhumations of McCrea's remains for forensic analysis have been unable to resolve the conflicting accounts.

The warriors who scalped her, and the official British stance, said that McCrae was struck by a Patriot musketball and killed while being marched back to the British camp. Her Indian escorts, wanting to claim their reward for capturing an alleged Patriot, decided to scalp her and take her hair as proof rather than carry a corpse several miles. Her fiance, and many others, believed she had simply been murdered by an overzealous scouting party.

The Patriot cause immediately seized on the incident as proof that the British could not uphold their promises to protect the Loyalists from raids and reprisals, and the sensationalized story struck a blow to Burgoyne's civilian base of support at a crucial time of the war.

In 2006 a research team, with the blessing of Jane's closest living relative and a court order, exhumed her grave for forensic examination. Most of her bones were intact and showed no signs of injury, but her skull was missing (likely looted during her first reburial in 1822) as were most ribs. With no signs of injury on the remains, even the best modern science cannot conclusively say if Jane McCrea was the unfortunate victim of a stray Patriot musket ball or of a native's hatchet during a British-sanctioned raid.

EDIT: I reread the actual 2006 report today, not just the summary I had saved, and apparently Sara McNeil's remains were reburied with Jane in 1822, causing no small challenge for the forensic team.