CNN  — 

The mother of a Chinese student who was admitted to Stanford University said the family gave $6.5 million to the man at the center of a massive college admissions scandal as a donation for scholarships and funding.

It has not been determined whether the student’s parents were seeking an advantage to get their daughter into Stanford with the payment to Rick Singer, the source said. There’s still the possibility they may have done nothing wrong but that will be determined by investigators, the source added.

Former Morgan Stanley adviser Michael Wu said he referred the parents to Singer.

Wu “was terminated for not cooperating with an internal investigation into the college admissions matter,” the spokeswoman said.

The student, her parents and Wu have not been charged in the scandal.

Investigators were aware of the information early on, but they did not have enough evidence to issue charges in March, the source added. Investigators are now looking into Morgan Stanley and the parents to see what they know.

In a statement, Stanford said it did not get the millions of dollars and did not know about the matter before it was widely reported.

“It’s important to clarify that Stanford did not receive $6.5 million from Singer, or from a student’s family working with Singer,” it said. “Stanford was not aware of this reported $6.5 million payment from the family to Singer.”

CNN has emailed the Chinese student requesting comment but has not received a reply, and has attempted to contact business associates of the family in Beijing.

College scheme mastermind got $25 million

Singer owned a college counseling and prep business, and was CEO of the Key Worldwide Foundation, the charity connected to it.

He was the owner of the college counseling and prep business known as “The Key” and the CEO of the Key Worldwide Foundation, the charity connected to it.

Through those organizations, he allegedly facilitated cheating on standardized tests, and bribing college coaches and administrators to falsely designate the children as recruited athletes – even if they didn’t play that sport.

Through those organizations, he allegedly facilitated both cheating on standardized tests such as the SAT and ACT, and bribing college coaches and administrators to falsely designate the children as recruited athletes, even if they didn’t play that sport.

Hollywood stars, top CEOs, college coaches and standardized test administrators allegedly took part in the scheme to cheat on tests and admit students to leading institutions as athletes, regardless of their abilities. At least eight universities, including Stanford and the University of Southern California, are referred to in a federal indictment and criminal complaint.

Singer was paid about $25 million by parents as part of the scheme, said Andrew Lelling, the US attorney for Massachusetts. Some of that money went to test administrators and coaches involved in the scam, prosecutors said.

Dozens of parents involved

Prosecutors have charged 50 people, including 33 parents of college-age students, of conspiring to use their wealth to get an advantage in the college admissions system.

A total of 17 wealthy parents, including actress Lori Loughlin, formally submitted not guilty pleas in federal court in Boston this week in the college admissions scam.

Loughlin and her husband, Mossimo Giannulli, had previously pleaded not guilty in federal court filings last month.

The filings to the charges of conspiracy to commit fraud and conspiracy to commit money laundering represented Loughlin’s first substantive response in the case. Prosecutors say she and Giannulli paid $500,000 to a fake charity to get their two daughters accepted into the University of Southern California, falsely designating them as crew recruits.

The “Full House” actress is the highest-profile figure caught up in a scandal that has embroiled dozens of wealthy parents, college coaches and standardized test administrators.

Actress Felicity Huffman was among more than a dozen parents who pleaded guilty to a charge of conspiracy to commit fraud last month. In exchange for the guilty plea, prosecutors said they will recommend incarceration at the “low end” of the sentencing range and will not bring further charges against her.

CNN’s Augie Martin, Eric Levenson and Sarah Jorgensen contributed to this report