Former Mumbai police commissioner Param Bir Singh, declared a proclaimed offender by a Mumbai court, arrived in Mumbai on Thursday after months in hiding.
Singh flew in from Chandigarh to join the investigation as ordered by the court.
After leaving the airport, Singh appeared before the Mumbai police crime branch to record his statement in connection with an extortion case.
The IPS officer, who is facing several extortion cases in Maharashtra, had told news channels on Wednesday that he was in Chandigarh.
Singh has not reported to work since May this year, after his transfer from the post of Mumbai police commissioner and his subsequent allegations of corruption against then Maharashtra home minister Anil Deshmukh.
Also watch: Anil Deshmukh sent to 14-day judicial custody, told to eat 'jail food first'
His long absence from public scene had fuelled speculation that he might have fled the country. Singh later told court that he was in the country.