SANANTONIO -- The city of San Antonio released surveillance video Friday of the May 15 escalator accident inside the Henry B. Gonzalez Convention Center.
One of the escalators inside Exhibit Hall D stopped and reversed direction, injuring 20 people attending a DISH Network summit.
A state investigation revealed a primary cause to be overcrowding.
The city attorney's office blocked KENS 5's initial request for video of the accident and maintenance records pertaining to the malfunctioning escalator, citing possible lawsuits from victims of the accident.
But last week, the Office of the Texas Attorney General ordered the city to release the information, stating media requests had been submitted before lawsuits had been filed against the city.
The document sent to KENS 5 indicates at least three people have taken steps to file lawsuits.
A separate mishap on the same escalator in August 2012 injured 12 people, none seriously.
In response to the incidents, the city instituted several safety procedures.
Convention goers now must enter escalators one person at a time and convention center staff members are now responsible for making sure the escalators do not get over crowded.
The emergency brake system, which failed under extraordinary weight, has been re-certified, according to documents given to KENS 5 by the city.