Police do not know if he was attacked or whether he fell and injured himself.
Mr Cabusao said there were no signs of a struggle in the man's house and so police were keeping an open mind. Yesterday, they were still talking to witnesses and locals.
But while the man was recovering in hospital, his home was vandalised and torched.
Around 2am on Friday, May 18, the man's home in Taniwha St was broken into, ransacked and vandalised and his couch was set on fire.
Mr Cabusao said neighbours saw smoke coming from the flat and called the FireService.
Fire safety investigators determined that the blaze was deliberately lit.
"As well, there were things thrown around and it wasn't the firemen that did that. There was also graffiti on the wall," Mr Cabusao said.
When the victim was told that his flat had been ransacked and his couch had been set alight, he rolled his eyes and sighed but was limited with his movements because of his neck-brace, Mr Cabusao said.
Although it appeared to have been ransacked, police couldn't yet be sure whether anything had been stolen.
"Without the victim going back to his house and saying, 'this is missing, that is missing', we can't really tell.
"Nothing obvious or of value [is missing] so far, but we can't confirm anything without the victim going home," Mr Cabusao said.
Police couldn't be certain that the two events were connected because they were still talking to witnesses and the victim did not remember what happened.
"It's possibly linked, but we're keeping an open mind."
Mr Cabusao understood the man would soon be discharged from Auckland Hospital to a brain injury recovery unit in Swanson.
Anyone with information about what happened is urged to contact the Glen Innes CIB on (09) 524 1920 or call Crimestoppers anonymously on 0800 555 111.
