little mysteries

My husband and I were on the way to the grocery store this am, taking the backroads on a beautiful June morning, doing some sight seeing. [That means, gee his corn looks good, they're just getting off the first cutting, look at that pretty little donkey, oh my God, that house burned, we should pick these rocks up where the grader came through.] Anyway, we came upon this older black cadillac driving very slowly, all right for a few minutes, maybe they were looking too. Then we noticed the plate, black with white lettering. Who has that type of plate? we wondered. As we got closer, she[ it's an elderly female driver] now had her right blinker on and there's no where to turn and we got a good look at the plate. It was a Michigan plate[ our state] but it's from 1979- and there was no updated tab on it. Something began to buzz in me. there's something wrong here. The lady is on and off the road. We followed her until she turned onto a main road, construction ahead and busier traffic. First one blinker on then the other, going about 25 miles an hour. We hoped she was going to turn into the grocery store where we were headed, it looks like it, but at the last minute she veered back onto the road. So I pulled into the parking lot and dialed 911, described the car and the direction she was headed, and they promised to send a patrol car that was close right after her. We got a quick glimpse as she passed, a tiny lady with both hands clenched on the wheel, looking straight ahead. I hope they were able to prevent her from hurting herself or anyone else. But now I am left with the mystery. My husband keeps laughing at me but I want to know what happened. Was the cadillac with the 1979 plates sitting in a garage somewhere until she decided she was going on a road trip? Would it still be drivable, the gas good, etc. after 28 years? My husband says no, it would have to have been started up every so often, new gas put in etc. There was no temporary plate on it. The car looked like the body was in excellent condition, but it was a cadillac from the 70's according to my husband. If she was stopped from driving 28 years ago would she still be able to make it to the car and get out on the road? Was the car her husbands, who started it up and keep it running for 28 years without renewing the plates, who recently died and she decided to use it? Was it put out by the road by her family to sell and she saw it, escaped from them and took off in it? I keep imagining she is suffering from dementia of some kind, but maybe she just decided years ago not to renew the plates because all she did was drive to church and the store and she has never been caught. Maybe she stole the car from where it was stored! Oh well, I will probably never know. I want to call the sheriff back and ask if they found her- it also worries me that she could have turned off the main road and is still driving. But my husband thinks I shouldn't bother the sheriffs department and he thinks its silly to be worrying about it. But still.... I hate this sort of thing. It will bug me forever.