There?s a new twist Wednesday in the murder investigation of the Greenwich real estate developer found stabbed to death earlier this month. Police have been searching for Andrew Kissel?s murderer since April 3. Now, Greenwich police are reportedly saying Hayley Wolff Kissel is not cooperating with the investigation into who killed her estranged husband. Howard Graber represented Andrew Kissel in his pending divorce to Hayley. He says her lack of cooperation could have something to do with financial matters that have either not been discovered yet or items she does not wish to disclose. Police won't say if they've identified any suspects or if Hayley is considered a suspect. Related Information