. >> reporter: lisa garber is cyber attorney based in philadelphia and says it's possible for this to happen on your cellphone. >> if someone is skilled enough with hacking ability and know what they want they can go after it and usually there's a way they can break in or tap into a signal on your phone. whether bluetooth connection or wifi connection. >> reporter: we asked and burlington county authorities would not say which specific app she used to stalk shan an o'rock. click your settings on on iphone and privacy and then click location services and a list will pop up with all apps on phone and you can choose whether or not to share your location with that specific ap app. if you don't have an iphone follow a similar process. >> message i want for people to take home tonight with the very, very serious case is to look at your phone, understand what applications are accessing your gps data. you don't need to be sharing that with different providers and don't need to share with friends and family and. >> reporter: lisa garber says it's possible in this case he may have installed a t

. >> reporter: lisa garber is cyber attorney based in philadelphia and says it's possible for this to happen on your cellphone. >> if someone is skilled enough with hacking ability and know what they want they can go after it and usually there's a way they can break in or tap into a signal on your phone. whether bluetooth connection or wifi connection. >> reporter: we asked and burlington county authorities would not say which specific app she used to stalk shan an o'rock. click your settings on on iphone and privacy and then click location services and a list will pop up with all apps on phone and you can choose whether or not to share your location with that specific ap app. if you don't have an iphone follow a similar process. >> message i want for people to take home tonight with the very, very serious case is to look at your phone, understand what applications are accessing your gps data. you don't need to be sharing that with different providers and don't need to share with friends and family and. >> reporter: lisa garber says it's possible in this case he may have installed a t