Once you die the hostile initiation is over. Now, bear in mind that if you shot at them you could still be red after respawn and might get shot at again due to the Red = Dead mantra. And technically no, storing your vehicle would not be combat storing as you are out of combat. HOWEVER You need to make damn sure they aren't trying to lockpick it or driving off with it. Because if they are and you do store it, then that would be a combat store and you could lose your vehicle if reported. Your best bet is to get your vehicle and drive away and store it in a different location.