Sherman said Trujillo, 21, plans to plead not guilty to charges of murder and conspiracy to commit murder.
Police also charged Trujillo's cousin, Carlos Trujillo, Kissel's driver, with conspiracy to commit murder. Trujillo, 47, of Bridgeport, pleaded not guilty.
The two men were charged in March.
Kissel, 46, was tied up and stabbed to death in his Greenwich mansion in April 2006, just days before he was to plead guilty in a multimillion-dollar real estate fraud case.
The Web site, WhoKilledAndrewKissel.com, solicits tips to provide leads confidentially through e-mail and also includes discussion boards where visitors may leave comments about the case.
"I've gotten a number of calls with leads and other information since I took the case," Sherman said. "My client is innocent of this murder and I hope a Web site like this brings his real killer to justice."
Greenwich Police Chief David Ridberg said police continue to investigate the murder in an attempt to identify additional conspirators.
A police tip line set up in the early stages of the Kissel investigation did not yield crucial information and police will consider new information brought forward by the Web site, he said.
"At the same time (we are) recognizing it is coming from someone who would like to deflect attention from his client," Ridberg said.
