Protecting my father

My dad has a small shop in New York and I do not know how many times he has been the victim of attempted robbery in his store. We tried to get him to sell the store but he does not want to give up his shop. So now we have changed tactics. We have got him a GPS bracelet so he can alert us at once just by pulling the bracelet and the alarm goes off.  In this way, we can make sure that he is safe and we can intervene quickly if something happens.