Authorities in Peru unearthed the body of a Sebastopol teen who died after drinking tea made from a hallucinogenic plant called ayahuasca during a spiritual retreat.
When Kyle Josef Nolan, 18, didn't return home on Aug. 27 as planned, his family filed a missing person's report and went to Peru to look for him.
Subsequently, the shaman who led the ritual admitted burying Nolan's body on the property of the Shimbre Shamanic Center, 530 miles east of Lima.
Police arrested the shaman, Jose Manuel Pineda Vargas, 58, and two men accused of helping Pineda bury the teen, Peruvian authorities said.
Nolan, who school officials confirmed graduated from Analy High in 2011, arrived in Puerto Maldonado Aug. 17, authorities said.
Pineda told local police that Nolan took ayahuasca during an Aug. 22 ritual and was found dead the next day, according to Peruvian National Police Col. Roberto Palomino, who discussed the investigation in a video that has been posted online.
Several reports indicate Pineda initially claimed that Nolan had disappeared.
Ayahuasca is a tea brewed with the leaves of a shrub called chacruna, a flowering plant called toe and "other natural substances," according to the Shimbre Shamanic Center's website.
The Associated Press contributed to this report.