John and the Burglars

John and the Burglars

It was late and John was about to climb into bed when his wife informed him that there was a light on in their garden shed.
John started to go outside to turn off the light but noticed some people in the shed who were busy stealing his things.
He ran back inside right away and called the cops, who asked him "Are there any intruders in your house?" to which John replied no and explained his circumstances.
The cops told John that all patrol cars were otherwise occupied, and that he should just lock his door and a uniformed cop would be at his house when one was free.
John answered, "Alright," hung up, waited 30 seconds, and then called the cops again.
"Hello, I just called a short while ago because there were people stealing things from my shed. I want to let you know that they're not a problem anymore because I've just shot every one of them."
John then hung up the phone. In five short minutes, three patrol cars, a SWAT team, and an ambulance arrived, and Of course, the cops caught the burglars in the act.
One of the cops snapped at John: "I thought you said that you shot every one of them!"
"I thought you said there were no patrol cars free!" John answered.