Anna Gristina, dubbed the Soccer Mom Madam, was reportedly with Morgan Stanley executive David Walker at the time of her arrest, raising questions about his involvement in the prostitution ring scandal that has unfolded around her.

Gristina was arrested last month while she was at Walker's office for a meeting in which she was trying to solicit money to fund what we believe is another illicit business venture on the Internet that involves matching up male clients with female prostitutes, said Assistant District Attorney Charles Linehan, according to a Feb. 23 court transcript obtained by the San Francisco Chronicle.

Gristina has been accused of having knowingly advanced and profited from prostitution by managing, supervising, controlling and owning, either alone or in association with others, a prostitution business, according to the indictment, filed in Supreme Court of the State of New York, reported the Chronicle.

Prosecutors have not accused Walker of any crime or publicly identified him, but was identified after the FOX Business Network spoke with Morgan Stanley officials Wednesday. Walker has since been placed on administrative leave, FOX reported.

We're investigating this matter, said Jim Wiggins, a spokesman for Morgan Stanley, the Chronicle reported. At this point, no individual at Morgan Stanley has been charged with any crime.

In the court transcript, Linehan referred Walker as a Morgan Stanley banker who [Gristina] counts as a close friend.

Walker spoke to DNAinfo about the case Wednesday and defended Gristina, saying she was a caring woman and mom next door. He said they met through mutual friends years ago, and that their relationship never involved business.

I never had any business dealings with her, Walker told DNAinfo. She had plenty of other people at Morgan Stanley, I don't know why they're talking about me.