It's been a while since I fired a Glock. This was an interesting observation in a followup story:
Inside a West Miami-Dade store, one gun owner said he had serious questions about the claim that the two-year-old boy fired the gun.
“It’s highly unlikely that this would have been possible because it requires five pounds of pressure to pull the trigger of a nine millimeter semi-automatic glock pistol like this one,” said longtime gun owner Kevin Gleason. “Even if the gun was chambered and ready to fire, this would have been very difficult. I don’t buy this story.”