Another would be robbery was foiled in Jacksonville Florida after a 57 year old man shot and killed one of the robbers, and sending the other fleeing.

According to wkov.com:

Unfortunately for one of them, the man happens to have a concealed weapons permit, and Lt. Rob Schoonover with the Jacksonville Sheriff's Office says the man wasted no time springing into action.

"There was a citizen who had a concealed firearms permit that was inside the store as a customer," says Lt. Schoonover. "He fired at the suspect, striking him and killing him."

The other suspect drove off in a small SUV.  Police are looking for him.  This isn't the first time a Grandpa saved the day, if you remember the story about a 63 year old man shooting would be muggers at an internet cafe.