Waters, 63, said that SEPTA hired 250 to 300 workers in 1990 to guard the transit stations at night. Waters said SEPTA shut the system down for financial reasons 10 years later.
Jim Jordan, assistant general manager for public and operational safety for SEPTA, said that he would not support reinstating the security guard system because it had substantial flaws.
"Toward the end it got a very bad reputation," he said. "It didn't train people or closely supervise them. In the end, people would sit in their chairs for their eight-hour shifts."
He also said that it is too difficult to predict when an accident will happen.
"Had there been a pattern or commonality of kids walking the tracks, that's when we would have focused our attention until we were able to stop it," Jordan said.
Jordan said that since he joined SEPTA in 2000, after the security guard program ended, the transit company had increased its police patrol in the city so that officers are not at a fixed post.
He SEPTA is still looking for a solution for guarding all its tracks.
"We're policing something the size of some towns," Jordan said. "I don't see [security guards] as a viable action, but we never try to rule anything out."
Jaime Tucker, Angelo's stepmother, said that any type of security could prevent this from happening again.
"I really think this could have been prevented if they had more security or more signs," she said. "There was too much easy access to get where they [were]."