AFL great Mark Thompson has been caught up in a drug trafficking investigation in which three other people have been charged.
Thompson, 54, was arrested on Tuesday before being released without charge, pending further police inquiries.
It comes after a home he owns in Port Melbourne was raided by police on Friday.
Three other people have been charged with drug trafficking following that raid and another search in Geelong.
They include Thomas Windsor, 28, who was reportedly staying at Thompson's renovated warehouse in Port Melbourne.
A 31-year-old Lara man and a 22-year-old Mill Park woman were also charged and remanded in custody.
Media reports suggest Windsor and the Lara man, named as Karl Holt, have bikie links in the Geelong area.
The trio were remanded in custody and are due to face court in Geelong at a later date.
Police said the arrests were part of an ongoing investigation into drug trafficking.
It's unclear how Thompson is allegedly connected to it.
His decorated AFL career includes three premierships during his playing days at Essendon and later coaching Geelong to two flags.
Thompson was an assistant coach at Essendon when the club's supplements saga came to light in 2013.