Michel may prove to be the missing link in the money trail in the alleged multi-crore scam being probed by the CBI.
CBI had registered a case against Tyagi along with 13 others including his cousins and European middlemen in the case.
Widening its probe in the Rs 3,600 crore VVIP chopper deal, the ED has begun a trail of "cash" which is suspected to have been paid as alleged kickbacks.
A special court on Saturday issued fresh summons against three accused in a money laundering case related to the Rs 3,600 crore VVIP chopper deal in which it had earlier issued an open-ended non-bailable warrant against British national and alleged middleman Christian Michel James.
A special court denied Christian Michel bail in the related Central Bureau of Investigation case.
Along with Tyagi, his cousin Sanjiv alias Julie Tyagi and lawyer Gautam Khaitan were also arrested.
The Enforcement Directorate on Friday slapped a money laundering case against former Indian Air Force chief SP Tyagi and 20 others in the Rs 3,600-crore AgustaWestland VVIP chopper deal to probe alleged kickbacks of Rs.360 crore.
Michel's counsel appeared with the application before Special Judge Arvind Kumar who issued notice to the probe agency and sought its reply by Saturday when he will take up the matter.
The Central Bureau of Investigation has started fresh questioning of the cousins of former IAF chief SP Tyagi in the Rs 3,600 crore AgustaWestland VVIP helicopter deal in light of claims by alleged middleman Guido Haschke that he had paid money to them.
The threat to him was given before he was extradited to New Delhi, he said.
The Central Bureau of Investigation on Monday questioned former Indian air force Chief S P Tyagi and two others in connection with alleged irregularities in the AgustaWestland helicopter deal.
The ED, in its chargesheet filed against Michel in June 2016, had alleged that he received 30 million (about Rs 225 crore) from AgustaWestland.
Michel was extradited in an operation under the guidance of National Security Advisor Ajit Doval, the Central Bureau of Investigation said on Tuesday.
Nitin Gokhale, national security expert and founder BharatShakti.in, tells us what the controversy is all about.
Michel, who was extradited from Dubai recently, was arrested by the Enforcement Directorate on December 22 and sent to a seven-day custody of the agency over money-laundering charges in the scam by a court.
A Delhi court has allowed the plea of two family members of former Indian Air Force chief S P Tyagi, accused in the Rs 3600 crore VVIP helicopter deal scam, to defreeze their bank accounts subject to certain conditions.
The Enforcement Directorate has filed a fresh charge sheet, delving specifically into the role of British national and alleged middleman Christian Michel James and his few Indian associates, in connection with its money laundering probe in the Rs 3,600 crore VVIP chopper deal.
A bail plea was also moved on his behalf. The court did not give any specific date for hearing the bail plea.
A Delhi court on Saturday sent former Air Force Chief S P Tyagi, arrested in Rs 450 crore Agusta Westland bribery case in procurement of 12 VVIP helicopters, to police custody for four days after the CBI said he was needed to be quizzed to unearth a "very large conspiracy having international ramifications".
Enforcement Directorate on Wednesday opposed in a Delhi court the bail plea of businessman Gautam Khaitan, arrested in connection with the money laundering case related to Rs 3,600 crore VVIP chopper deal, claiming that he was behind the "parking" of alleged kickbacks in the matter.
The Delhi High Court on Thursday sought response of the Centre and the Enforcement Directorate on the bail plea of businessman Gautam Khaitan, arrested last month in a money laundering case related to the Rs 3,600-crore VVIP chopper deal.
In the matter pertaining to acquisition of AgustaWestland helicopters, the undisputed central issue that stands out is corruption, especially bribery, the statement said.