According to law enforcement officials and published news reports, text messages between an alleged madam and prostitute may have a hand in bringing down "Client 9", an apparent reference to New York Governor Eliot Spitzer.  It appears that Client 9 went out of his way to avoid using electronic communications that could have easily been traced back to him.

Indeed, in a interview with ABC News two years ago, Spitzer, then-attorney general, told ABC News he had some advice for people who break the law. "Never talk when you can nod, and never nod when you can wink, and never write an e-mail because it's death. You're giving prosecutors all the evidence we need," he said.

Instead of a wire transfer, Client 9 allegedly sent thousands of dollars in cash through regular mail without a return address on the envelope.  The money was to cover the escort service and the prostitute's transportation from New York to Washington D.C.  In text messages exchanged between two defendants in the prostitution case, one wrote to the other:

"Pls let me know if [Client-9's] 'package' (believed to be a reference to a deposit of money sent by mail) arrives 2mrw. Appt wd b on Wed."

Text messages were also sent to solidify the planned meeting between Client 9 and the alleged prostitute "Kristen". 

"If D.C. appt. happens u will need 2 leave NYC @ 4:45pm. Is that possible?"

Kristen replied, "yes."

In addition to the text messages, authorities have audio recordings from phone wiretaps between Client 9 and members of the escort service.