The Arizona body donation center where FBI agents found “a bucket of heads” and body parts sewn together “like Frankenstein” also sold a woman’s corpse to the US Army — where it was used for “blast testing,” her son recalled in a new report.

Jim Stauffer said he trusted Biological Resource Center to make sure his mother’s brain would be donated to neurologists studying Alzheimer’s disease, which she suffered from before her death more than five years ago at the age of 73.

“I’m not a trusting person, but in this situation you have no idea this is going on — you trust,” Stauffer told local TV-station ABC15 in a report published Tuesday. “I think that trust is what they fed on.”

“There was paperwork signed stating what was and what was not to happen with her body,” he added — including a box he says he checked prohibiting military and other non-medical experiments.

Within days, Stauffer said he received a box with what he was told were the majority of his mother Doris Stauffer’s ashes.

Years later, Stauffer says a Reuters reporter contacted him for a report that revealed that his mother was one of many bodies sold to the US Army and used to test the effects of explosive devices on humans.

“She was supposedly strapped in a chair on some sort of apparatus, and a detonation took place underneath her to basically kind of get an idea of what the human body goes through when a vehicle is hit by an IED,” Stauffer told the outlet.

Every time he sees a photo of his mother, Stauffer says he can’t forget what happened to her.

“I don’t see a pathway of ever getting past this,” he said. “ Every time there’s a memory, every time there’s a photograph you look at, there’s this ugly thing that happened just right there staring right at you.”

Stauffer is one of 33 plaintiffs suing the now-shuttered chop shop in a suit that recently revealed FBI agents probing the illegal trafficking and sale of human body parts discovered buckets of body parts, a cooler filled with male genitalia and a woman’s head sewn to a male torso at the center.

The lawsuit also names the body donations center’s owner, Stephen Gore.

“He didn’t care about the families, he didn’t care about the people and he didn’t care about the memories,” Stauffer said. “If I can be a little small part of his personal financial destruction, I don’t care.”