I am totally confused about your situation on who is stalking and for what, but anyways thats none of my business.
Take a look at an app called as iOnRoad
. This is actually a personal driving assistant which I seriously considered but I learned that it saves your track and emails you at the end of the trip. So if thats what you want, this one should work for your needs but if you are looking for your 'personal' location as opposed to you in the car then it won't work. You better go to the police and tell them to help you out. Take someone or two with you to corroborate your narration to the officer.