Tongan police say Mr Fungavaka, who was in Tonga to bury his grandfather, was arrested for a minor drunkenness offence after going to a club with a relative.
A witness said Mr Fungavaka had been at Reload Bar - a popular tourist spot - on Friday the week before and was seen being escorted with another male by two police officers. A security guard who did not want to be named said: "He was pretty drunk, I'll tell you that. But for the way he was, he didn't have any problems with yelling, screaming, cussing or anything like that.
"But you could tell he was pretty drunk because he couldn't walk straight. They were both the same."
Asked if Mr Fungavaka had been struggling with the officers, the security guard said: "No, he was really quiet. Yes, he was drunk, but he didn't do anything, he wasn't screaming, yelling or anything."
Assistant police commissioner Viliami 'Unga Fa'aoa confirmed that Mr Fungavaka's relative had been in the same cell and was present when he was attacked. He did not return calls yesterday.