A senior at Sabino High School was taken into custody after Border Patrol and Bureau of Land Management Agents came upon an unattended campfire near Sonoita a week ago.
Federal agents discovered the explosives materials and the suspect near Empire Ranch Road.
"They found what they believed was a PVC pipe bomb and a box of chemicals, which were homemade explosive precursors," said Sgt. Chris Rogers, who heads the Pima Regional Bomb Squad.
According to Rogers, 18-year-old Jordan Fink was questioned.
"He admitted he was using the chemicals to manufacture explosives and was experimenting," said Rogers.
News 4 Tucson uncovered a search warrant, which revealed what authorities found inside the suspect's East Side home.
"We did recover about a quarter pound of homemade live explosives in the home," said Rogers.
They seized a cell phone, a laptop, a desktop computer, handheld radios and a circuit board.
The ATF and FBI are now analyzing everything they found.
"It is concerning," said Rogers. "We don't believe he is radicalized or he has ties to extremists groups, but he is putting himself, his family and the public in danger."
As for the explosives, Rogers said it was a precursor to the one used in the World Trade Center bombing in 1993.
"The explosives we recovered from the home were the same explosives used in the San Bernardino and Boston Marathon Bombings," he said.
Investigators said he had done some advance research.
"We found a ledger with some schematics," said Rogers. "In it some plans, shopping lists with websites and prices."
They believe the 18-year-old was just curious and experimenting. However, they are taking the situation very seriously.
"You know, we're not making a cake here, you're making something that kills people," said Rogers.
Jordan Fink is charged with two counts on manufacturing a prohibited weapon.
He is out on a $50,000 bond, and is wearing an ankle bracelet .
Rogers said the FBI is supposed to have the results of the computer forensics by the end of the week.
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