Because he believed that such a call would be pointless.
In many jurisdictions, it would be pointless. By department policy, officers will respond to 911 calls only in cases of homicide or active assaults. Burglars are free to walk away unimpeded, if they are smart.
That's why you eventually get vigilantes.
I meant the jogger. If he felt so threatened by the people following him from the house, why didn’t he call 911?