"We want this to be dedicated to all those who have been lost to violence, and all their families who live bravely without them," Andy's father Alan Marshall said last Friday.
He and his wife Wendy were brought to WA after the public and police raised $4200 for the plaque and their trip in a campaign organised by Sergeant Matt Donkin, in consultation with the hotel.
Rock Machine bikie associate Stephan Schmidt (29) pushed Mr Marshall, who had been working in Perth for more than two years and drumming in the band Black Widow, through a glass window about 7m to the pavement.
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READ NOWMr Schmidt is now serving nine years for manslaughter, after his murder conviction was overturned in 2014.
"The message today is clear, that violence is unacceptable here, in our homes, in our communities," Mr Marshall said.
About 100 of Andy's friends and former workmates were at the opening, in addition to senior police.
"It's nice to have everyone here because it's about the end, about who Andy is, and all his friends," Mrs Marshall said.
A heartfelt Maori haka by Andy's former housemates and work colleagues completed the unveiling. "He was good, always cheeky, and as his father said, used to eat us out of house and home," haka leader Alex Pirikahu said.