Car Alarms: cant turn off my car alarm, chrysler new yorker, 1994 chrysler new yorker

Question
it is a 1994 Chrysler New Yorker it was factory installed.
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-----Question-----
I locked my keys in my car. Security officer used a slim jim and got them out. The question is how do I turn off my alarm. It let me drive to the store about a mile down the round. I turned it on, off and drove back to the hospital, parked it and turned it off and the lights started blinking and when I tried to start it, it would start then just die. It is stuck in hospital parking lot. Can you please help me?
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I need to know some info first. What kind of vehicle, What year, factory alarm or aftermarket? if it is aftermarket I need to know brand and model. Once I know this I should be able to help you.

Answer
How did you make out on your car? Just curious if the info helped or not.