Mr Chatterjee was seen on the Narada sting tape taking wads of cash from Narada CEO Mathew Samuel. This was allegedly in April 2014, and allegedly in his office - the Mayor's office.
The CBI team was there to film the office and "reconstruct the alleged crime". Mr Chatterjee was not in office when the CBI team arrived. He entered about 10 to 15 minutes later.
"Let the CBI do its job. I have nothing to say," Mr Chatterjee said.
His wife, too, has been summoned several times by Enforcement Directorate but she has excused herself saying she was in London for medical treatment and advised not to travel.
The Trinamool leader who has just quit, Mukul Roy, has also been summoned by ED later this month.
Mr Chatterjee is not the only Trinamool leader whose "alleged crime" has been "reconstructed. The CBI has conducted the "reconstruction" at the home or office of Bengal's current transport minister Suvendu Adhikari, the former transport minister Madan Mitra, and MP Aparupa Poddar, among others.