An excerpt from an long article by Bloomberg News:
"In early March, they said, Equifax began notifying a small number of outsiders and banking customers that it had suffered a breach and was bringing in a security firm to help investigate. The company's outside counsel, Atlanta-based law firm King & Spalding, first engaged Mandiant at about that time. While it's not clear how long the Mandiant and Equifax security teams conducted that probe, one person said there are indications it began to wrap up in May. Equifax has yet to disclose that March breach to the public "
Now it turns out that the same intruders hacked Equifax back in March and they never disclosed or acknowledged the hack.
In addition they chose not to implement the software patch that they knew would fix the problem.
This company deserves the death sentence !