In this photo provided by the National Park Service is the Abyss Pool hot spring in the southern part of Yellowstone National Park, Wyo., in June 2015.

Yellowstone National Park officials have released new information about the 70-year-old man whosefoot was found floating in a thermal poollast summer, although the details of his death remain unknown.

The newly-released park documents shed new light as to what took place during the investigation and how officials came to their conclusions.

By the time witness statements and interviews had been completed, three vehicles remained parked in the area, although two were quickly claimed, according to the documents. The remaining car was registered to the victim, officials discovered.

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Inside the vehicle, a number of personal items were found, including a laptop, park maps, personal photos, a wallet containing $447, as well as a “small book of poems” that contained handwritten notes, the documents stated.

Investigators indicated in the documents that they used Google Translate to decipher the poems and notes they found, and were “unable to find anything consistent with a suicide note.” An additional search did not find any other possible note.

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In the documents, officials said that “no other stay information was available.”

Using items collected from the vehicle, investigators were able to find a family member who consented to submitting a DNA sample, which was compared to remains from the foot, the documents stated.

The National Park Service did not immediately respond to PEOPLE’s request for comment.

After the foot was discovered, officials temporarily closed West Thumb Geyser Basin and its parking lot, per a previousstatementfrom the park. Additionally, they shared a cautionary notice to visitors.

“Visitors are reminded to stay on boardwalks and trails in thermal areas and exercise extreme caution around thermal features,” officials wrote at the time. “The ground in hydrothermal areas is fragile and thin, and there is scalding water just below the surface.”

source: people.com