Hassan Ali was immigration controller when the journalist went missing.
The commission posted video footage of the male suspect.
The proposed changes have prompted concerns over civil rights and due process.
No arrests have been made a week after a presidential commission disclosed findings.
The journalist was killed by a local al-Qaeda affiliate, an inquiry commission concluded.
Rilwan was beheaded and his body was sunk, a presidential commission found.
The group recruits locals to fight in Syria.
Rilwan's family said the state was failing to deliver justice.
Several opposition figures have called for Adeeb to be allowed to seek medical treatment overseas.
A very capable team worked on the investigation, the ex-police chief said.
Last year's anniversary march was met with pepper spray as police snatched placards and arrested nine people.
Police knew Rilwan was followed by a suspect who was allowed to leave the country.
Yameen told his home minister not to be "overwhelmed" by Rilwan's abduction, according to chat logs from a cabinet Viber group seen by the Maldives Independent.
The president denied thwarting the investigation into the missing journalist, "who is now dead."
The government says it is not responsible for his disappearance.
It is almost four years since the abduction of Maldives Independent journalist Ahmed Rilwan.
DNA lifted from hairs found in the trunk of a car owned by one of the defendants matched Rilwan’s mother.