WATCH: '60 Minutes' Revisits Theranos, Elizabeth Holmes Scandal

PALO ALTO, CA — A recent episode of CBS "60 Minutes" revisited the media blitz and alleged "incredible deception" surrounding former Stanford University student Elizabeth Holmes and the blood-testing device Edison marketed by Theranos, the Palo Alto-based company she founded. The May 20 episode featured insider interviews with former Theranos employees Tyler Shulz, a Stanford biology graduate who went to work for Holmes in 2013; biochemist Doug Matje; and Berkeley grad Erica Cheung.

"I totally bought into it," said Shulz, a former family friend of Holmes.

Theranos was founded by Holmes when she was 19 year old. At its height, the Edison, through investors, made her the youngest self-made female billionaire in the world.

But former employees of the Silicon Valley start-up spoke of problems with the device once touted as the "iPod of health care."

WATCH THE "60 Minutes" SEGMENT:

"There were components that would kind of fall off in the middle of testing that you would then have to fish out..." Shulz told "60 Minutes."

Cheung worked as a lab tech and recalled contradictory test results being sent to Walgreens patients.

Matje spoke of investor events where blood tests appeared to be administered with the Edison but were processed behind the scenes by "scientists at the bench."

In March, Theranos and Holmes were accused by the U.S. Securities and Exchange Commission of "elaborate, years-long fraud" that deceived investors into providing more $700 million. The SEC simultaneously filed a civil lawsuit against Theranos Inc. and Holmes, 34, in federal court in San Francisco and announced a settlement in which Holmes would step down from authority there and pay millions of dollars in fines and stock to be returned to the company.

The SEC said that under the settlement, Holmes, of Los Altos Hills, would pay a fine of $500,000, return 18.9 million shares to the company, relinquish her voting control of the company and be barred from serving as an officer of a publicly traded company for 10 years.

"She created a world where she was Steve Jobs for a little bit," Shulz said.

"60 Minutes" said Holmes would not comment for the Sunday night segment.

Read more about the recent "60 Minutes" coverage here.

Bay City News Service contributed to this report.

Lead photo: MOUNTAIN VIEW, CA: CEO Theranos Elizabeth Holmes attends the 2016 Breakthrough Prize Ceremony on November 8, 2015 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)