John William King, who is white and an avowed racist, was put on death row for chaining James Byrd Jr. to the back of a truck and dragging his body for nearly 3 miles.
A classmate of the Pinnacle High School student told his parents Monday that the suspect had said he "wanted to 'blow up a Muslim church,'" police said.
Tuesday's death is the second fatal fall inside the park this year, and the third in the Grand Canyon area.
Police say the incident appears to be intentional and the FBI is now assisting in the investigation.
Elizabeth Warren just proposed canceling student loan debt for most debtors.