In the 1980s he became an ambulance worker until an injury forced him to rethink his situation.
While being treated by ambulance workers, Williams is said to have "lashed out" at those helping him.
For instance, ambulance workers should not be sent out to a venue before the area has been secured by police.
But the ambulance workers knew they would be back.
The commission might have found some evidence if it had examined the report filed by the ambulance workers who responded to the home.
Two doctors and two ambulance workers are on trial charged in the deaths of 18 people.
"The ambulance workers had to pick me up off of the street to take me to the hospital," she said, her voice wavering.
They will all disguise themselves as ambulance workers and use a patient trolley with a false bottom.
In October, ambulance workers responding to a 911 call were initially blocked by club security, fire officials said.
The ambulance workers asked the police to return.