It's been five years since the Federal Bureau of Investigation raided the Biological Resource Center, a body donor company in Phoenix, Arizona, for fraud.

However, the sheer horror of what was found inside the facility wasn't revealed until now.

The FBI raided this body donor company in 2017 after allegations that the center was selling human body parts for profit.

According to investigation reports revealed by court documents, the officials found stockpiles of random body parts including legs, arms, human heads as well as a cooler filled with male genitalia.

Former FBI assistant, Special Agent Mark Cwynar, said in a testimony that he saw piles of human body parts with no means to identify where the bodies came from.

Also found in the building was a male torso "with the head removed and replaced with a similar head sewn together in a 'Frankenstein manner.'" The replaced head was from a female.

According to Reuters reports, investigators discovered 10 tons of frozen human remains, comprising 1,755 body parts, including 281 heads, 241 shoulders, 337 legs, and 97 spines.

Authorities hauled away these body parts preserved in the facility's freezers, filling up to 142 body bags.

And one bag held parts from at least 36 different individuals.

The seizure was so massive that officials struggled much to handle the body parts properly.

After the details of the investigation were revealed, at least eight families have sued the company. They claim that they donated the bodies of their loved ones under the impression the facility was conducting medical research.

But as it turns out, the center was allegedly selling body part of the donated bodies.

Arizona Republic newspaper reported that at least 33 plaintiffs had sued the Biological Resource Center, saying that the bodies of their family members were acquired through a "false statement."

The human body parts were actually being sold for profit, and they were not stored, treated, or properly disposed of with dignity or respect.

One of the FBI agents who stormed the facility, Mathew Parker, told Reuters that he got Post Traumatic Stress Disorder (PTSD) from moving the body parts.

He said:

"I couldn't sleep at night after seeing that."

"It looked like a junkyard chop shop where they are just ripping things apart."

Arizona is a regulatory-free zone for body parts trade. The state currently has at least four body-donor companies operating in the region.

What more, the state has a non-profit cryonics company that freezes bodies, intending to bring them back to life. The details of this project have been featured in the Liquid Science TV show.

Responding to the Biological Resource Center case, the Arizona legislature passed a statute in 2017 requiring all body donor companies to obtain a state permit to operate. However, the law is yet to be implemented.

Stephen Gore, the former Biological Resource Center, pleaded guilty to fraud and misleading clients by selling contaminated specimens. Gore was sentenced to a one-year deferred jail term and four years probation.

In October, he's also expected to appear in court to face families who've filed lawsuits against him.