The seven-year-old boy was kidnapped on October 14 from an area under Ganha police station limits in Bihar's Champaran district, the official from Mumbai police said.
Senior Maharashtra BJP leader Fadnavis is his partys poll in-charge in Bihar, where elections will be held in three phases on October 28, November 3 and November 7.
In first-ever digital initiative, Bihar police set up voice recording system to transcribe case diaries
In 9 out of 11 police stations of Arwal district, which was once infested by extremists, case diaries are written by IOs under the Crime and Criminal Tracking Network and System.
The verdict came on a plea filed by Chakraborty who had sought transfer of the FIR lodged against her at Patna to Mumbai.
Bihar's Advocate General Lalit Kishore said that the apex court order vindicated that the steps taken by the state government were as per the law and the constitution.
The state government told the top court that Bihar Police cannot register FIR in the case and carry out any investigation on the ground of alleged "inaction or illegal" action of the Mumbai Police.
"Now the citizens also do not trust Mumbai Police so let CBI handle the case. What message are they conveying in the entire country?" Gupteshwar Pandey said.
Upon his return to Patna late Friday night, Tiwari, who is posted here as the SP City (East), however, declined to spill the beans on the findings of the investigation.
Centre files impleadment application seeking to be made a party in Sushant Singh Rajput suicide case
Tiwari had reached Mumbai on Sunday to oversee the probe into the FIR filed against actress Rhea Chakraborty in Rajput's death case.
According to the procedure, the documents were handed over to investigating officer ASP Anil Kumar Yadav, they said.
Court was hearing two petitions raising concerns over the manner in which the Mumbai police were investigating the case and the media reporting on it.
The case will be probed by a special investigation team under Superintendent of Police Nupur Prasad and will be supervised by DIG Gagandeep Gambhir and Joint Director Manoj Shashidhar.
Bihar police had registered a case of abetment to suicide, criminal conspiracy, cheating among other charges on a complaint from the family of the deceased actor.
The Bihar Police also recorded the statement of Rajput's manager Deepesh Sawant, the official said, adding that they have so far recorded statements of 10 people.