"His face was bloody, black. He had black eyes. He wasn't well."
Mr Ram said the area where the man was found was a popular place for homeless people to sleep.
He had checked the security footage from his building and said there was no sign of the attack, only movements of several homeless people to and from the area.
He did not recognise the injured man as someone who regularly spent the night there.
"It was pretty scary. That corner is smelly and disgusting; there are heaps of boxes and cardboard there."
Police set up a mobile command centre in the area yesterday and visited the Herald's security office to inquire about security cameras and footage.
They also viewed hours of footage captured on cameras belonging to other businesses in the lane.
A police spokeswoman said they wanted to speak to the three people captured on CCTV in Mills Lane to see if they could help the inquiry.
The pictures were taken about 6am on Wednesday.
Auckland City Missioner Diane Robertson said the assault on the man was horrific.
"He is known to the mission. We all find it incredibly difficult when someone that we know is assaulted."
Last night, Mayor Len Brown appealed for anyone with information about the "despicable and cowardly attack" to contact the police immediately.