The laundering was done by Scaglione. He took what the undercover agent gave him and deposited it in his attorney-client trust account. He then transferred the money out of his account into the agent's account with a Long Island bank. He was sure to send it in amounts less than $10,000 so as not to trigger any fraud alerts.
That was the laundering. He told the agent they couldn't be caught because his doing what he did was protected by attorney-client privilege.
Carrillo Huettel did the same thing, according to the SEC. The agency subpoenaed their trust account records. CH tried to quash the subpoena, and failed.
"structuring" in terms of financial transactions and money laundering has a very specific meaning.
It is illegal to break up a large transaction into less than $10,000 cash transactions to evade reporting requirements (in simple terms) is "structuring" or money laundering.