New Delhi, July 3 -- An appellate tribunal that deals with the money laundering cases has upheld the Enforcement Directorate's attachment of senior Congress leader and former finance minister P Chidambaram's son Karti Chidambaram's properties in Aircel-Maxis deal probe, while rejecting his arguments that the attachments should be set aside because the agency had not filed a charge sheet in the case by then. In an order passed last month, after almost seven years, the appellate tribunal for forfeited property (ATFP) in Delhi, dismissed Karti's arguments that attachment of funds worth Rs.1.16 crore was done before filing of the charge sheet. The Aircel-Maxis probe is an offshoot of the 2G spectrum scam, in which a Delhi court discharged all t...